diff --git a/cmd/login_influxdb.go b/cmd/login_influxdb.go
index 87cc019fb0c..b26fecb7da3 100644
--- a/cmd/login_influxdb.go
+++ b/cmd/login_influxdb.go
@@ -26,13 +26,12 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/mitchellh/mapstructure"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/afero"
 	"github.com/spf13/cobra"
 	"golang.org/x/term"
+	"gopkg.in/guregu/null.v3"
 
-	"go.k6.io/k6/lib/types"
 	"go.k6.io/k6/output/influxdb"
 	"go.k6.io/k6/ui"
 )
@@ -101,17 +100,11 @@ This will set the default server used when just "-o influxdb" is passed.`,
 				return err
 			}
 
-			dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
-				DecodeHook: types.NullDecoder,
-				Result:     &conf,
-			})
-			if err != nil {
-				return err
-			}
+			conf.Addr = null.StringFrom(vals["Addr"].(string))
+			conf.DB = null.StringFrom(vals["DB"].(string))
+			conf.Username = null.StringFrom(vals["Username"].(string))
+			conf.Password = null.StringFrom(vals["Password"].(string))
 
-			if err = dec.Decode(vals); err != nil {
-				return err
-			}
 			client, err := influxdb.MakeClient(conf)
 			if err != nil {
 				return err
diff --git a/go.mod b/go.mod
index b76bed36614..49f7f99692a 100644
--- a/go.mod
+++ b/go.mod
@@ -24,7 +24,6 @@ require (
 	github.com/mattn/go-colorable v0.1.8
 	github.com/mattn/go-isatty v0.0.13
 	github.com/mccutchen/go-httpbin v1.1.2-0.20190116014521-c5cb2f4802fa
-	github.com/mitchellh/mapstructure v1.1.2
 	github.com/nu7hatch/gouuid v0.0.0-20131221200532-179d4d0c4d8d
 	github.com/onsi/ginkgo v1.14.0 // indirect
 	github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c
diff --git a/go.sum b/go.sum
index 216a663c011..946d01d1573 100644
--- a/go.sum
+++ b/go.sum
@@ -201,7 +201,6 @@ github.com/mitchellh/go-testing-interface v1.0.0/go.mod h1:kRemZodwjscx+RGhAo8eI
 github.com/mitchellh/gox v0.4.0/go.mod h1:Sd9lOJ0+aimLBi73mGofS1ycjY8lL3uZM3JPS42BGNg=
 github.com/mitchellh/iochan v1.0.0/go.mod h1:JwYml1nuB7xOzsp52dPpHFffvOCDupsG0QubkSMEySY=
 github.com/mitchellh/mapstructure v0.0.0-20160808181253-ca63d7c062ee/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
-github.com/mitchellh/mapstructure v1.1.2 h1:fmNYVwqnSfB9mZU6OS2O6GsXM+wcskZDuKQzvN1EDeE=
 github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
diff --git a/js/compiler/compiler.go b/js/compiler/compiler.go
index 0de205a0818..8a108a32378 100644
--- a/js/compiler/compiler.go
+++ b/js/compiler/compiler.go
@@ -27,7 +27,6 @@ import (
 
 	"github.com/dop251/goja"
 	"github.com/dop251/goja/parser"
-	"github.com/mitchellh/mapstructure"
 	"github.com/sirupsen/logrus"
 
 	"go.k6.io/k6/lib"
@@ -109,7 +108,7 @@ func (c *Compiler) initializeBabel() error {
 }
 
 // Transform the given code into ES5
-func (c *Compiler) Transform(src, filename string) (code string, srcmap *SourceMap, err error) {
+func (c *Compiler) Transform(src, filename string) (code string, srcmap []byte, err error) {
 	if c.babel == nil {
 		onceBabel.Do(func() {
 			globalBabel, err = newBabel()
@@ -197,7 +196,8 @@ func newBabel() (*babel, error) {
 
 // Transform the given code into ES5, while synchronizing to ensure only a single
 // bundle instance / Goja VM is in use at a time.
-func (b *babel) Transform(logger logrus.FieldLogger, src, filename string) (string, *SourceMap, error) {
+// TODO the []byte is there to be used as the returned sourcemap and will be done in PR #2082
+func (b *babel) Transform(logger logrus.FieldLogger, src, filename string) (string, []byte, error) {
 	b.m.Lock()
 	defer b.m.Unlock()
 	opts := make(map[string]interface{})
@@ -218,15 +218,7 @@ func (b *babel) Transform(logger logrus.FieldLogger, src, filename string) (stri
 	if err = b.vm.ExportTo(vO.Get("code"), &code); err != nil {
 		return code, nil, err
 	}
-	var rawMap map[string]interface{}
-	if err = b.vm.ExportTo(vO.Get("map"), &rawMap); err != nil {
-		return code, nil, err
-	}
-	var srcMap SourceMap
-	if err = mapstructure.Decode(rawMap, &srcMap); err != nil {
-		return code, &srcMap, err
-	}
-	return code, &srcMap, err
+	return code, nil, err
 }
 
 // Pool is a pool of compilers so it can be used easier in parallel tests as they have their own babel.
diff --git a/js/compiler/sourcemap.go b/js/compiler/sourcemap.go
deleted file mode 100644
index 0ac5ae12b91..00000000000
--- a/js/compiler/sourcemap.go
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- *
- * k6 - a next-generation load testing tool
- * Copyright (C) 2017 Load Impact
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-package compiler
-
-type SourceMap struct {
-	Version    int
-	File       string
-	SourceRoot string
-	Sources    []string
-	Names      []string
-	Mappings   string
-}
diff --git a/lib/types/types.go b/lib/types/types.go
index 66626305124..592f58980a6 100644
--- a/lib/types/types.go
+++ b/lib/types/types.go
@@ -25,67 +25,11 @@ import (
 	"encoding/json"
 	"fmt"
 	"math"
-	"reflect"
 	"strconv"
 	"strings"
 	"time"
-
-	"gopkg.in/guregu/null.v3"
 )
 
-// NullDecoder converts data with expected type f to a guregu/null value
-// of equivalent type t. It returns an error if a type mismatch occurs.
-func NullDecoder(f reflect.Type, t reflect.Type, data interface{}) (interface{}, error) {
-	typeFrom := f.String()
-	typeTo := t.String()
-
-	expectedType := ""
-	switch typeTo {
-	case "null.String":
-		if typeFrom == reflect.String.String() {
-			return null.StringFrom(data.(string)), nil
-		}
-		expectedType = reflect.String.String()
-	case "null.Bool":
-		if typeFrom == reflect.Bool.String() {
-			return null.BoolFrom(data.(bool)), nil
-		}
-		expectedType = reflect.Bool.String()
-	case "null.Int":
-		if typeFrom == reflect.Int.String() {
-			return null.IntFrom(int64(data.(int))), nil
-		}
-		if typeFrom == reflect.Int32.String() {
-			return null.IntFrom(int64(data.(int32))), nil
-		}
-		if typeFrom == reflect.Int64.String() {
-			return null.IntFrom(data.(int64)), nil
-		}
-		expectedType = reflect.Int.String()
-	case "null.Float":
-		if typeFrom == reflect.Float32.String() {
-			return null.FloatFrom(float64(data.(float32))), nil
-		}
-		if typeFrom == reflect.Float64.String() {
-			return null.FloatFrom(data.(float64)), nil
-		}
-		expectedType = reflect.Float32.String() + " or " + reflect.Float64.String()
-	case "types.NullDuration":
-		if typeFrom == reflect.String.String() {
-			var d NullDuration
-			err := d.UnmarshalText([]byte(data.(string)))
-			return d, err
-		}
-		expectedType = reflect.String.String()
-	}
-
-	if expectedType != "" {
-		return data, fmt.Errorf("expected '%s', got '%s'", expectedType, typeFrom)
-	}
-
-	return data, nil
-}
-
 // TODO: something better that won't require so much boilerplate and casts for NullDuration values...
 
 // Duration is an alias for time.Duration that de/serialises to JSON as human-readable strings.
diff --git a/lib/types/types_test.go b/lib/types/types_test.go
index cb881ed36d8..5cb2fc6d3ab 100644
--- a/lib/types/types_test.go
+++ b/lib/types/types_test.go
@@ -27,79 +27,9 @@ import (
 	"testing"
 	"time"
 
-	"github.com/mitchellh/mapstructure"
 	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-	"gopkg.in/guregu/null.v3"
 )
 
-func TestNullDecoder(t *testing.T) {
-	type foo struct {
-		Strs      []string
-		Str       null.String
-		Boolean   null.Bool
-		Integer   null.Int
-		Integer32 null.Int
-		Integer64 null.Int
-		Float32   null.Float
-		Float64   null.Float
-		Dur       NullDuration
-	}
-	f := foo{}
-	dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
-		DecodeHook: NullDecoder,
-		Result:     &f,
-	})
-	require.NoError(t, err)
-
-	conf := map[string]interface{}{
-		"strs":      []string{"fake"},
-		"str":       "bar",
-		"boolean":   true,
-		"integer":   42,
-		"integer32": int32(42),
-		"integer64": int64(42),
-		"float32":   float32(3.14),
-		"float64":   float64(3.14),
-		"dur":       "1m",
-	}
-
-	err = dec.Decode(conf)
-	require.NoError(t, err)
-
-	require.Equal(t, foo{
-		Strs:      []string{"fake"},
-		Str:       null.StringFrom("bar"),
-		Boolean:   null.BoolFrom(true),
-		Integer:   null.IntFrom(42),
-		Integer32: null.IntFrom(42),
-		Integer64: null.IntFrom(42),
-		Float32:   null.FloatFrom(3.140000104904175),
-		Float64:   null.FloatFrom(3.14),
-		Dur:       NewNullDuration(1*time.Minute, true),
-	}, f)
-
-	input := map[string][]interface{}{
-		"Str":       {true, "string", "bool"},
-		"Boolean":   {"invalid", "bool", "string"},
-		"Integer":   {"invalid", "int", "string"},
-		"Integer32": {true, "int", "bool"},
-		"Integer64": {"invalid", "int", "string"},
-		"Float32":   {true, "float32 or float64", "bool"},
-		"Float64":   {"invalid", "float32 or float64", "string"},
-		"Dur":       {10, "string", "int"},
-	}
-
-	for k, v := range input {
-		t.Run("Error Message/"+k, func(t *testing.T) {
-			err = dec.Decode(map[string]interface{}{
-				k: v[0],
-			})
-			assert.EqualError(t, err, fmt.Sprintf("1 error(s) decoding:\n\n* error decoding '%s': expected '%s', got '%s'", k, v[1], v[2]))
-		})
-	}
-}
-
 func TestParseExtendedDuration(t *testing.T) {
 	testCases := []struct {
 		durStr string
diff --git a/modtools_frozen.yml b/modtools_frozen.yml
index 98751042da7..038f914f735 100644
--- a/modtools_frozen.yml
+++ b/modtools_frozen.yml
@@ -40,9 +40,6 @@
 - path: github.com/manyminds/api2go
   minVersion: v0.0.0-20180125085803-95be7bd0455e
   validUntil: 2029-08-04T16:33:07+03:00
-- path: github.com/mitchellh/mapstructure
-  minVersion: v1.1.2
-  validUntil: 2029-08-04T16:51:38+03:00
 - path: golang.org/x/sys
   minVersion: v0.0.0-20201204225414-ed752295db88
   validUntil: 2029-08-04T17:00:51+03:00
diff --git a/output/influxdb/config.go b/output/influxdb/config.go
index f56c5643952..37858b1b4bf 100644
--- a/output/influxdb/config.go
+++ b/output/influxdb/config.go
@@ -29,7 +29,6 @@ import (
 	"time"
 
 	"github.com/kelseyhightower/envconfig"
-	"github.com/mitchellh/mapstructure"
 	"gopkg.in/guregu/null.v3"
 
 	"go.k6.io/k6/lib/types"
@@ -115,24 +114,6 @@ func (c Config) Apply(cfg Config) Config {
 	return c
 }
 
-// ParseMap parses a map[string]interface{} into a Config
-func ParseMap(m map[string]interface{}) (Config, error) {
-	c := Config{}
-	if v, ok := m["tagsAsFields"].(string); ok {
-		m["tagsAsFields"] = []string{v}
-	}
-	dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
-		DecodeHook: types.NullDecoder,
-		Result:     &c,
-	})
-	if err != nil {
-		return c, err
-	}
-
-	err = dec.Decode(m)
-	return c, err
-}
-
 // ParseJSON parses the supplied JSON into a Config.
 func ParseJSON(data json.RawMessage) (Config, error) {
 	conf := Config{}
diff --git a/vendor/github.com/mitchellh/mapstructure/CHANGELOG.md b/vendor/github.com/mitchellh/mapstructure/CHANGELOG.md
deleted file mode 100644
index 3b3cb723f81..00000000000
--- a/vendor/github.com/mitchellh/mapstructure/CHANGELOG.md
+++ /dev/null
@@ -1,21 +0,0 @@
-## 1.1.2
-
-* Fix error when decode hook decodes interface implementation into interface
-  type. [GH-140]
-
-## 1.1.1
-
-* Fix panic that can happen in `decodePtr`
-
-## 1.1.0
-
-* Added `StringToIPHookFunc` to convert `string` to `net.IP` and `net.IPNet` [GH-133]
-* Support struct to struct decoding [GH-137]
-* If source map value is nil, then destination map value is nil (instead of empty)
-* If source slice value is nil, then destination slice value is nil (instead of empty)
-* If source pointer is nil, then destination pointer is set to nil (instead of
-  allocated zero value of type)
-
-## 1.0.0
-
-* Initial tagged stable release.
diff --git a/vendor/github.com/mitchellh/mapstructure/LICENSE b/vendor/github.com/mitchellh/mapstructure/LICENSE
deleted file mode 100644
index f9c841a51e0..00000000000
--- a/vendor/github.com/mitchellh/mapstructure/LICENSE
+++ /dev/null
@@ -1,21 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2013 Mitchell Hashimoto
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
diff --git a/vendor/github.com/mitchellh/mapstructure/README.md b/vendor/github.com/mitchellh/mapstructure/README.md
deleted file mode 100644
index 0018dc7d9f9..00000000000
--- a/vendor/github.com/mitchellh/mapstructure/README.md
+++ /dev/null
@@ -1,46 +0,0 @@
-# mapstructure [![Godoc](https://godoc.org/github.com/mitchellh/mapstructure?status.svg)](https://godoc.org/github.com/mitchellh/mapstructure)
-
-mapstructure is a Go library for decoding generic map values to structures
-and vice versa, while providing helpful error handling.
-
-This library is most useful when decoding values from some data stream (JSON,
-Gob, etc.) where you don't _quite_ know the structure of the underlying data
-until you read a part of it. You can therefore read a `map[string]interface{}`
-and use this library to decode it into the proper underlying native Go
-structure.
-
-## Installation
-
-Standard `go get`:
-
-```
-$ go get github.com/mitchellh/mapstructure
-```
-
-## Usage & Example
-
-For usage and examples see the [Godoc](http://godoc.org/github.com/mitchellh/mapstructure).
-
-The `Decode` function has examples associated with it there.
-
-## But Why?!
-
-Go offers fantastic standard libraries for decoding formats such as JSON.
-The standard method is to have a struct pre-created, and populate that struct
-from the bytes of the encoded format. This is great, but the problem is if
-you have configuration or an encoding that changes slightly depending on
-specific fields. For example, consider this JSON:
-
-```json
-{
-  "type": "person",
-  "name": "Mitchell"
-}
-```
-
-Perhaps we can't populate a specific structure without first reading
-the "type" field from the JSON. We could always do two passes over the
-decoding of the JSON (reading the "type" first, and the rest later).
-However, it is much simpler to just decode this into a `map[string]interface{}`
-structure, read the "type" key, then use something like this library
-to decode it into the proper structure.
diff --git a/vendor/github.com/mitchellh/mapstructure/decode_hooks.go b/vendor/github.com/mitchellh/mapstructure/decode_hooks.go
deleted file mode 100644
index 1f0abc65ab7..00000000000
--- a/vendor/github.com/mitchellh/mapstructure/decode_hooks.go
+++ /dev/null
@@ -1,217 +0,0 @@
-package mapstructure
-
-import (
-	"errors"
-	"fmt"
-	"net"
-	"reflect"
-	"strconv"
-	"strings"
-	"time"
-)
-
-// typedDecodeHook takes a raw DecodeHookFunc (an interface{}) and turns
-// it into the proper DecodeHookFunc type, such as DecodeHookFuncType.
-func typedDecodeHook(h DecodeHookFunc) DecodeHookFunc {
-	// Create variables here so we can reference them with the reflect pkg
-	var f1 DecodeHookFuncType
-	var f2 DecodeHookFuncKind
-
-	// Fill in the variables into this interface and the rest is done
-	// automatically using the reflect package.
-	potential := []interface{}{f1, f2}
-
-	v := reflect.ValueOf(h)
-	vt := v.Type()
-	for _, raw := range potential {
-		pt := reflect.ValueOf(raw).Type()
-		if vt.ConvertibleTo(pt) {
-			return v.Convert(pt).Interface()
-		}
-	}
-
-	return nil
-}
-
-// DecodeHookExec executes the given decode hook. This should be used
-// since it'll naturally degrade to the older backwards compatible DecodeHookFunc
-// that took reflect.Kind instead of reflect.Type.
-func DecodeHookExec(
-	raw DecodeHookFunc,
-	from reflect.Type, to reflect.Type,
-	data interface{}) (interface{}, error) {
-	switch f := typedDecodeHook(raw).(type) {
-	case DecodeHookFuncType:
-		return f(from, to, data)
-	case DecodeHookFuncKind:
-		return f(from.Kind(), to.Kind(), data)
-	default:
-		return nil, errors.New("invalid decode hook signature")
-	}
-}
-
-// ComposeDecodeHookFunc creates a single DecodeHookFunc that
-// automatically composes multiple DecodeHookFuncs.
-//
-// The composed funcs are called in order, with the result of the
-// previous transformation.
-func ComposeDecodeHookFunc(fs ...DecodeHookFunc) DecodeHookFunc {
-	return func(
-		f reflect.Type,
-		t reflect.Type,
-		data interface{}) (interface{}, error) {
-		var err error
-		for _, f1 := range fs {
-			data, err = DecodeHookExec(f1, f, t, data)
-			if err != nil {
-				return nil, err
-			}
-
-			// Modify the from kind to be correct with the new data
-			f = nil
-			if val := reflect.ValueOf(data); val.IsValid() {
-				f = val.Type()
-			}
-		}
-
-		return data, nil
-	}
-}
-
-// StringToSliceHookFunc returns a DecodeHookFunc that converts
-// string to []string by splitting on the given sep.
-func StringToSliceHookFunc(sep string) DecodeHookFunc {
-	return func(
-		f reflect.Kind,
-		t reflect.Kind,
-		data interface{}) (interface{}, error) {
-		if f != reflect.String || t != reflect.Slice {
-			return data, nil
-		}
-
-		raw := data.(string)
-		if raw == "" {
-			return []string{}, nil
-		}
-
-		return strings.Split(raw, sep), nil
-	}
-}
-
-// StringToTimeDurationHookFunc returns a DecodeHookFunc that converts
-// strings to time.Duration.
-func StringToTimeDurationHookFunc() DecodeHookFunc {
-	return func(
-		f reflect.Type,
-		t reflect.Type,
-		data interface{}) (interface{}, error) {
-		if f.Kind() != reflect.String {
-			return data, nil
-		}
-		if t != reflect.TypeOf(time.Duration(5)) {
-			return data, nil
-		}
-
-		// Convert it by parsing
-		return time.ParseDuration(data.(string))
-	}
-}
-
-// StringToIPHookFunc returns a DecodeHookFunc that converts
-// strings to net.IP
-func StringToIPHookFunc() DecodeHookFunc {
-	return func(
-		f reflect.Type,
-		t reflect.Type,
-		data interface{}) (interface{}, error) {
-		if f.Kind() != reflect.String {
-			return data, nil
-		}
-		if t != reflect.TypeOf(net.IP{}) {
-			return data, nil
-		}
-
-		// Convert it by parsing
-		ip := net.ParseIP(data.(string))
-		if ip == nil {
-			return net.IP{}, fmt.Errorf("failed parsing ip %v", data)
-		}
-
-		return ip, nil
-	}
-}
-
-// StringToIPNetHookFunc returns a DecodeHookFunc that converts
-// strings to net.IPNet
-func StringToIPNetHookFunc() DecodeHookFunc {
-	return func(
-		f reflect.Type,
-		t reflect.Type,
-		data interface{}) (interface{}, error) {
-		if f.Kind() != reflect.String {
-			return data, nil
-		}
-		if t != reflect.TypeOf(net.IPNet{}) {
-			return data, nil
-		}
-
-		// Convert it by parsing
-		_, net, err := net.ParseCIDR(data.(string))
-		return net, err
-	}
-}
-
-// StringToTimeHookFunc returns a DecodeHookFunc that converts
-// strings to time.Time.
-func StringToTimeHookFunc(layout string) DecodeHookFunc {
-	return func(
-		f reflect.Type,
-		t reflect.Type,
-		data interface{}) (interface{}, error) {
-		if f.Kind() != reflect.String {
-			return data, nil
-		}
-		if t != reflect.TypeOf(time.Time{}) {
-			return data, nil
-		}
-
-		// Convert it by parsing
-		return time.Parse(layout, data.(string))
-	}
-}
-
-// WeaklyTypedHook is a DecodeHookFunc which adds support for weak typing to
-// the decoder.
-//
-// Note that this is significantly different from the WeaklyTypedInput option
-// of the DecoderConfig.
-func WeaklyTypedHook(
-	f reflect.Kind,
-	t reflect.Kind,
-	data interface{}) (interface{}, error) {
-	dataVal := reflect.ValueOf(data)
-	switch t {
-	case reflect.String:
-		switch f {
-		case reflect.Bool:
-			if dataVal.Bool() {
-				return "1", nil
-			}
-			return "0", nil
-		case reflect.Float32:
-			return strconv.FormatFloat(dataVal.Float(), 'f', -1, 64), nil
-		case reflect.Int:
-			return strconv.FormatInt(dataVal.Int(), 10), nil
-		case reflect.Slice:
-			dataType := dataVal.Type()
-			elemKind := dataType.Elem().Kind()
-			if elemKind == reflect.Uint8 {
-				return string(dataVal.Interface().([]uint8)), nil
-			}
-		case reflect.Uint:
-			return strconv.FormatUint(dataVal.Uint(), 10), nil
-		}
-	}
-
-	return data, nil
-}
diff --git a/vendor/github.com/mitchellh/mapstructure/error.go b/vendor/github.com/mitchellh/mapstructure/error.go
deleted file mode 100644
index 47a99e5af3f..00000000000
--- a/vendor/github.com/mitchellh/mapstructure/error.go
+++ /dev/null
@@ -1,50 +0,0 @@
-package mapstructure
-
-import (
-	"errors"
-	"fmt"
-	"sort"
-	"strings"
-)
-
-// Error implements the error interface and can represents multiple
-// errors that occur in the course of a single decode.
-type Error struct {
-	Errors []string
-}
-
-func (e *Error) Error() string {
-	points := make([]string, len(e.Errors))
-	for i, err := range e.Errors {
-		points[i] = fmt.Sprintf("* %s", err)
-	}
-
-	sort.Strings(points)
-	return fmt.Sprintf(
-		"%d error(s) decoding:\n\n%s",
-		len(e.Errors), strings.Join(points, "\n"))
-}
-
-// WrappedErrors implements the errwrap.Wrapper interface to make this
-// return value more useful with the errwrap and go-multierror libraries.
-func (e *Error) WrappedErrors() []error {
-	if e == nil {
-		return nil
-	}
-
-	result := make([]error, len(e.Errors))
-	for i, e := range e.Errors {
-		result[i] = errors.New(e)
-	}
-
-	return result
-}
-
-func appendErrors(errors []string, err error) []string {
-	switch e := err.(type) {
-	case *Error:
-		return append(errors, e.Errors...)
-	default:
-		return append(errors, e.Error())
-	}
-}
diff --git a/vendor/github.com/mitchellh/mapstructure/go.mod b/vendor/github.com/mitchellh/mapstructure/go.mod
deleted file mode 100644
index d2a71256208..00000000000
--- a/vendor/github.com/mitchellh/mapstructure/go.mod
+++ /dev/null
@@ -1 +0,0 @@
-module github.com/mitchellh/mapstructure
diff --git a/vendor/github.com/mitchellh/mapstructure/mapstructure.go b/vendor/github.com/mitchellh/mapstructure/mapstructure.go
deleted file mode 100644
index 256ee63fbf3..00000000000
--- a/vendor/github.com/mitchellh/mapstructure/mapstructure.go
+++ /dev/null
@@ -1,1149 +0,0 @@
-// Package mapstructure exposes functionality to convert an arbitrary
-// map[string]interface{} into a native Go structure.
-//
-// The Go structure can be arbitrarily complex, containing slices,
-// other structs, etc. and the decoder will properly decode nested
-// maps and so on into the proper structures in the native Go struct.
-// See the examples to see what the decoder is capable of.
-package mapstructure
-
-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"reflect"
-	"sort"
-	"strconv"
-	"strings"
-)
-
-// DecodeHookFunc is the callback function that can be used for
-// data transformations. See "DecodeHook" in the DecoderConfig
-// struct.
-//
-// The type should be DecodeHookFuncType or DecodeHookFuncKind.
-// Either is accepted. Types are a superset of Kinds (Types can return
-// Kinds) and are generally a richer thing to use, but Kinds are simpler
-// if you only need those.
-//
-// The reason DecodeHookFunc is multi-typed is for backwards compatibility:
-// we started with Kinds and then realized Types were the better solution,
-// but have a promise to not break backwards compat so we now support
-// both.
-type DecodeHookFunc interface{}
-
-// DecodeHookFuncType is a DecodeHookFunc which has complete information about
-// the source and target types.
-type DecodeHookFuncType func(reflect.Type, reflect.Type, interface{}) (interface{}, error)
-
-// DecodeHookFuncKind is a DecodeHookFunc which knows only the Kinds of the
-// source and target types.
-type DecodeHookFuncKind func(reflect.Kind, reflect.Kind, interface{}) (interface{}, error)
-
-// DecoderConfig is the configuration that is used to create a new decoder
-// and allows customization of various aspects of decoding.
-type DecoderConfig struct {
-	// DecodeHook, if set, will be called before any decoding and any
-	// type conversion (if WeaklyTypedInput is on). This lets you modify
-	// the values before they're set down onto the resulting struct.
-	//
-	// If an error is returned, the entire decode will fail with that
-	// error.
-	DecodeHook DecodeHookFunc
-
-	// If ErrorUnused is true, then it is an error for there to exist
-	// keys in the original map that were unused in the decoding process
-	// (extra keys).
-	ErrorUnused bool
-
-	// ZeroFields, if set to true, will zero fields before writing them.
-	// For example, a map will be emptied before decoded values are put in
-	// it. If this is false, a map will be merged.
-	ZeroFields bool
-
-	// If WeaklyTypedInput is true, the decoder will make the following
-	// "weak" conversions:
-	//
-	//   - bools to string (true = "1", false = "0")
-	//   - numbers to string (base 10)
-	//   - bools to int/uint (true = 1, false = 0)
-	//   - strings to int/uint (base implied by prefix)
-	//   - int to bool (true if value != 0)
-	//   - string to bool (accepts: 1, t, T, TRUE, true, True, 0, f, F,
-	//     FALSE, false, False. Anything else is an error)
-	//   - empty array = empty map and vice versa
-	//   - negative numbers to overflowed uint values (base 10)
-	//   - slice of maps to a merged map
-	//   - single values are converted to slices if required. Each
-	//     element is weakly decoded. For example: "4" can become []int{4}
-	//     if the target type is an int slice.
-	//
-	WeaklyTypedInput bool
-
-	// Metadata is the struct that will contain extra metadata about
-	// the decoding. If this is nil, then no metadata will be tracked.
-	Metadata *Metadata
-
-	// Result is a pointer to the struct that will contain the decoded
-	// value.
-	Result interface{}
-
-	// The tag name that mapstructure reads for field names. This
-	// defaults to "mapstructure"
-	TagName string
-}
-
-// A Decoder takes a raw interface value and turns it into structured
-// data, keeping track of rich error information along the way in case
-// anything goes wrong. Unlike the basic top-level Decode method, you can
-// more finely control how the Decoder behaves using the DecoderConfig
-// structure. The top-level Decode method is just a convenience that sets
-// up the most basic Decoder.
-type Decoder struct {
-	config *DecoderConfig
-}
-
-// Metadata contains information about decoding a structure that
-// is tedious or difficult to get otherwise.
-type Metadata struct {
-	// Keys are the keys of the structure which were successfully decoded
-	Keys []string
-
-	// Unused is a slice of keys that were found in the raw value but
-	// weren't decoded since there was no matching field in the result interface
-	Unused []string
-}
-
-// Decode takes an input structure and uses reflection to translate it to
-// the output structure. output must be a pointer to a map or struct.
-func Decode(input interface{}, output interface{}) error {
-	config := &DecoderConfig{
-		Metadata: nil,
-		Result:   output,
-	}
-
-	decoder, err := NewDecoder(config)
-	if err != nil {
-		return err
-	}
-
-	return decoder.Decode(input)
-}
-
-// WeakDecode is the same as Decode but is shorthand to enable
-// WeaklyTypedInput. See DecoderConfig for more info.
-func WeakDecode(input, output interface{}) error {
-	config := &DecoderConfig{
-		Metadata:         nil,
-		Result:           output,
-		WeaklyTypedInput: true,
-	}
-
-	decoder, err := NewDecoder(config)
-	if err != nil {
-		return err
-	}
-
-	return decoder.Decode(input)
-}
-
-// DecodeMetadata is the same as Decode, but is shorthand to
-// enable metadata collection. See DecoderConfig for more info.
-func DecodeMetadata(input interface{}, output interface{}, metadata *Metadata) error {
-	config := &DecoderConfig{
-		Metadata: metadata,
-		Result:   output,
-	}
-
-	decoder, err := NewDecoder(config)
-	if err != nil {
-		return err
-	}
-
-	return decoder.Decode(input)
-}
-
-// WeakDecodeMetadata is the same as Decode, but is shorthand to
-// enable both WeaklyTypedInput and metadata collection. See
-// DecoderConfig for more info.
-func WeakDecodeMetadata(input interface{}, output interface{}, metadata *Metadata) error {
-	config := &DecoderConfig{
-		Metadata:         metadata,
-		Result:           output,
-		WeaklyTypedInput: true,
-	}
-
-	decoder, err := NewDecoder(config)
-	if err != nil {
-		return err
-	}
-
-	return decoder.Decode(input)
-}
-
-// NewDecoder returns a new decoder for the given configuration. Once
-// a decoder has been returned, the same configuration must not be used
-// again.
-func NewDecoder(config *DecoderConfig) (*Decoder, error) {
-	val := reflect.ValueOf(config.Result)
-	if val.Kind() != reflect.Ptr {
-		return nil, errors.New("result must be a pointer")
-	}
-
-	val = val.Elem()
-	if !val.CanAddr() {
-		return nil, errors.New("result must be addressable (a pointer)")
-	}
-
-	if config.Metadata != nil {
-		if config.Metadata.Keys == nil {
-			config.Metadata.Keys = make([]string, 0)
-		}
-
-		if config.Metadata.Unused == nil {
-			config.Metadata.Unused = make([]string, 0)
-		}
-	}
-
-	if config.TagName == "" {
-		config.TagName = "mapstructure"
-	}
-
-	result := &Decoder{
-		config: config,
-	}
-
-	return result, nil
-}
-
-// Decode decodes the given raw interface to the target pointer specified
-// by the configuration.
-func (d *Decoder) Decode(input interface{}) error {
-	return d.decode("", input, reflect.ValueOf(d.config.Result).Elem())
-}
-
-// Decodes an unknown data type into a specific reflection value.
-func (d *Decoder) decode(name string, input interface{}, outVal reflect.Value) error {
-	var inputVal reflect.Value
-	if input != nil {
-		inputVal = reflect.ValueOf(input)
-
-		// We need to check here if input is a typed nil. Typed nils won't
-		// match the "input == nil" below so we check that here.
-		if inputVal.Kind() == reflect.Ptr && inputVal.IsNil() {
-			input = nil
-		}
-	}
-
-	if input == nil {
-		// If the data is nil, then we don't set anything, unless ZeroFields is set
-		// to true.
-		if d.config.ZeroFields {
-			outVal.Set(reflect.Zero(outVal.Type()))
-
-			if d.config.Metadata != nil && name != "" {
-				d.config.Metadata.Keys = append(d.config.Metadata.Keys, name)
-			}
-		}
-		return nil
-	}
-
-	if !inputVal.IsValid() {
-		// If the input value is invalid, then we just set the value
-		// to be the zero value.
-		outVal.Set(reflect.Zero(outVal.Type()))
-		if d.config.Metadata != nil && name != "" {
-			d.config.Metadata.Keys = append(d.config.Metadata.Keys, name)
-		}
-		return nil
-	}
-
-	if d.config.DecodeHook != nil {
-		// We have a DecodeHook, so let's pre-process the input.
-		var err error
-		input, err = DecodeHookExec(
-			d.config.DecodeHook,
-			inputVal.Type(), outVal.Type(), input)
-		if err != nil {
-			return fmt.Errorf("error decoding '%s': %s", name, err)
-		}
-	}
-
-	var err error
-	outputKind := getKind(outVal)
-	switch outputKind {
-	case reflect.Bool:
-		err = d.decodeBool(name, input, outVal)
-	case reflect.Interface:
-		err = d.decodeBasic(name, input, outVal)
-	case reflect.String:
-		err = d.decodeString(name, input, outVal)
-	case reflect.Int:
-		err = d.decodeInt(name, input, outVal)
-	case reflect.Uint:
-		err = d.decodeUint(name, input, outVal)
-	case reflect.Float32:
-		err = d.decodeFloat(name, input, outVal)
-	case reflect.Struct:
-		err = d.decodeStruct(name, input, outVal)
-	case reflect.Map:
-		err = d.decodeMap(name, input, outVal)
-	case reflect.Ptr:
-		err = d.decodePtr(name, input, outVal)
-	case reflect.Slice:
-		err = d.decodeSlice(name, input, outVal)
-	case reflect.Array:
-		err = d.decodeArray(name, input, outVal)
-	case reflect.Func:
-		err = d.decodeFunc(name, input, outVal)
-	default:
-		// If we reached this point then we weren't able to decode it
-		return fmt.Errorf("%s: unsupported type: %s", name, outputKind)
-	}
-
-	// If we reached here, then we successfully decoded SOMETHING, so
-	// mark the key as used if we're tracking metainput.
-	if d.config.Metadata != nil && name != "" {
-		d.config.Metadata.Keys = append(d.config.Metadata.Keys, name)
-	}
-
-	return err
-}
-
-// This decodes a basic type (bool, int, string, etc.) and sets the
-// value to "data" of that type.
-func (d *Decoder) decodeBasic(name string, data interface{}, val reflect.Value) error {
-	if val.IsValid() && val.Elem().IsValid() {
-		return d.decode(name, data, val.Elem())
-	}
-
-	dataVal := reflect.ValueOf(data)
-
-	// If the input data is a pointer, and the assigned type is the dereference
-	// of that exact pointer, then indirect it so that we can assign it.
-	// Example: *string to string
-	if dataVal.Kind() == reflect.Ptr && dataVal.Type().Elem() == val.Type() {
-		dataVal = reflect.Indirect(dataVal)
-	}
-
-	if !dataVal.IsValid() {
-		dataVal = reflect.Zero(val.Type())
-	}
-
-	dataValType := dataVal.Type()
-	if !dataValType.AssignableTo(val.Type()) {
-		return fmt.Errorf(
-			"'%s' expected type '%s', got '%s'",
-			name, val.Type(), dataValType)
-	}
-
-	val.Set(dataVal)
-	return nil
-}
-
-func (d *Decoder) decodeString(name string, data interface{}, val reflect.Value) error {
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-	dataKind := getKind(dataVal)
-
-	converted := true
-	switch {
-	case dataKind == reflect.String:
-		val.SetString(dataVal.String())
-	case dataKind == reflect.Bool && d.config.WeaklyTypedInput:
-		if dataVal.Bool() {
-			val.SetString("1")
-		} else {
-			val.SetString("0")
-		}
-	case dataKind == reflect.Int && d.config.WeaklyTypedInput:
-		val.SetString(strconv.FormatInt(dataVal.Int(), 10))
-	case dataKind == reflect.Uint && d.config.WeaklyTypedInput:
-		val.SetString(strconv.FormatUint(dataVal.Uint(), 10))
-	case dataKind == reflect.Float32 && d.config.WeaklyTypedInput:
-		val.SetString(strconv.FormatFloat(dataVal.Float(), 'f', -1, 64))
-	case dataKind == reflect.Slice && d.config.WeaklyTypedInput,
-		dataKind == reflect.Array && d.config.WeaklyTypedInput:
-		dataType := dataVal.Type()
-		elemKind := dataType.Elem().Kind()
-		switch elemKind {
-		case reflect.Uint8:
-			var uints []uint8
-			if dataKind == reflect.Array {
-				uints = make([]uint8, dataVal.Len(), dataVal.Len())
-				for i := range uints {
-					uints[i] = dataVal.Index(i).Interface().(uint8)
-				}
-			} else {
-				uints = dataVal.Interface().([]uint8)
-			}
-			val.SetString(string(uints))
-		default:
-			converted = false
-		}
-	default:
-		converted = false
-	}
-
-	if !converted {
-		return fmt.Errorf(
-			"'%s' expected type '%s', got unconvertible type '%s'",
-			name, val.Type(), dataVal.Type())
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodeInt(name string, data interface{}, val reflect.Value) error {
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-	dataKind := getKind(dataVal)
-	dataType := dataVal.Type()
-
-	switch {
-	case dataKind == reflect.Int:
-		val.SetInt(dataVal.Int())
-	case dataKind == reflect.Uint:
-		val.SetInt(int64(dataVal.Uint()))
-	case dataKind == reflect.Float32:
-		val.SetInt(int64(dataVal.Float()))
-	case dataKind == reflect.Bool && d.config.WeaklyTypedInput:
-		if dataVal.Bool() {
-			val.SetInt(1)
-		} else {
-			val.SetInt(0)
-		}
-	case dataKind == reflect.String && d.config.WeaklyTypedInput:
-		i, err := strconv.ParseInt(dataVal.String(), 0, val.Type().Bits())
-		if err == nil {
-			val.SetInt(i)
-		} else {
-			return fmt.Errorf("cannot parse '%s' as int: %s", name, err)
-		}
-	case dataType.PkgPath() == "encoding/json" && dataType.Name() == "Number":
-		jn := data.(json.Number)
-		i, err := jn.Int64()
-		if err != nil {
-			return fmt.Errorf(
-				"error decoding json.Number into %s: %s", name, err)
-		}
-		val.SetInt(i)
-	default:
-		return fmt.Errorf(
-			"'%s' expected type '%s', got unconvertible type '%s'",
-			name, val.Type(), dataVal.Type())
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodeUint(name string, data interface{}, val reflect.Value) error {
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-	dataKind := getKind(dataVal)
-
-	switch {
-	case dataKind == reflect.Int:
-		i := dataVal.Int()
-		if i < 0 && !d.config.WeaklyTypedInput {
-			return fmt.Errorf("cannot parse '%s', %d overflows uint",
-				name, i)
-		}
-		val.SetUint(uint64(i))
-	case dataKind == reflect.Uint:
-		val.SetUint(dataVal.Uint())
-	case dataKind == reflect.Float32:
-		f := dataVal.Float()
-		if f < 0 && !d.config.WeaklyTypedInput {
-			return fmt.Errorf("cannot parse '%s', %f overflows uint",
-				name, f)
-		}
-		val.SetUint(uint64(f))
-	case dataKind == reflect.Bool && d.config.WeaklyTypedInput:
-		if dataVal.Bool() {
-			val.SetUint(1)
-		} else {
-			val.SetUint(0)
-		}
-	case dataKind == reflect.String && d.config.WeaklyTypedInput:
-		i, err := strconv.ParseUint(dataVal.String(), 0, val.Type().Bits())
-		if err == nil {
-			val.SetUint(i)
-		} else {
-			return fmt.Errorf("cannot parse '%s' as uint: %s", name, err)
-		}
-	default:
-		return fmt.Errorf(
-			"'%s' expected type '%s', got unconvertible type '%s'",
-			name, val.Type(), dataVal.Type())
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodeBool(name string, data interface{}, val reflect.Value) error {
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-	dataKind := getKind(dataVal)
-
-	switch {
-	case dataKind == reflect.Bool:
-		val.SetBool(dataVal.Bool())
-	case dataKind == reflect.Int && d.config.WeaklyTypedInput:
-		val.SetBool(dataVal.Int() != 0)
-	case dataKind == reflect.Uint && d.config.WeaklyTypedInput:
-		val.SetBool(dataVal.Uint() != 0)
-	case dataKind == reflect.Float32 && d.config.WeaklyTypedInput:
-		val.SetBool(dataVal.Float() != 0)
-	case dataKind == reflect.String && d.config.WeaklyTypedInput:
-		b, err := strconv.ParseBool(dataVal.String())
-		if err == nil {
-			val.SetBool(b)
-		} else if dataVal.String() == "" {
-			val.SetBool(false)
-		} else {
-			return fmt.Errorf("cannot parse '%s' as bool: %s", name, err)
-		}
-	default:
-		return fmt.Errorf(
-			"'%s' expected type '%s', got unconvertible type '%s'",
-			name, val.Type(), dataVal.Type())
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodeFloat(name string, data interface{}, val reflect.Value) error {
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-	dataKind := getKind(dataVal)
-	dataType := dataVal.Type()
-
-	switch {
-	case dataKind == reflect.Int:
-		val.SetFloat(float64(dataVal.Int()))
-	case dataKind == reflect.Uint:
-		val.SetFloat(float64(dataVal.Uint()))
-	case dataKind == reflect.Float32:
-		val.SetFloat(dataVal.Float())
-	case dataKind == reflect.Bool && d.config.WeaklyTypedInput:
-		if dataVal.Bool() {
-			val.SetFloat(1)
-		} else {
-			val.SetFloat(0)
-		}
-	case dataKind == reflect.String && d.config.WeaklyTypedInput:
-		f, err := strconv.ParseFloat(dataVal.String(), val.Type().Bits())
-		if err == nil {
-			val.SetFloat(f)
-		} else {
-			return fmt.Errorf("cannot parse '%s' as float: %s", name, err)
-		}
-	case dataType.PkgPath() == "encoding/json" && dataType.Name() == "Number":
-		jn := data.(json.Number)
-		i, err := jn.Float64()
-		if err != nil {
-			return fmt.Errorf(
-				"error decoding json.Number into %s: %s", name, err)
-		}
-		val.SetFloat(i)
-	default:
-		return fmt.Errorf(
-			"'%s' expected type '%s', got unconvertible type '%s'",
-			name, val.Type(), dataVal.Type())
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodeMap(name string, data interface{}, val reflect.Value) error {
-	valType := val.Type()
-	valKeyType := valType.Key()
-	valElemType := valType.Elem()
-
-	// By default we overwrite keys in the current map
-	valMap := val
-
-	// If the map is nil or we're purposely zeroing fields, make a new map
-	if valMap.IsNil() || d.config.ZeroFields {
-		// Make a new map to hold our result
-		mapType := reflect.MapOf(valKeyType, valElemType)
-		valMap = reflect.MakeMap(mapType)
-	}
-
-	// Check input type and based on the input type jump to the proper func
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-	switch dataVal.Kind() {
-	case reflect.Map:
-		return d.decodeMapFromMap(name, dataVal, val, valMap)
-
-	case reflect.Struct:
-		return d.decodeMapFromStruct(name, dataVal, val, valMap)
-
-	case reflect.Array, reflect.Slice:
-		if d.config.WeaklyTypedInput {
-			return d.decodeMapFromSlice(name, dataVal, val, valMap)
-		}
-
-		fallthrough
-
-	default:
-		return fmt.Errorf("'%s' expected a map, got '%s'", name, dataVal.Kind())
-	}
-}
-
-func (d *Decoder) decodeMapFromSlice(name string, dataVal reflect.Value, val reflect.Value, valMap reflect.Value) error {
-	// Special case for BC reasons (covered by tests)
-	if dataVal.Len() == 0 {
-		val.Set(valMap)
-		return nil
-	}
-
-	for i := 0; i < dataVal.Len(); i++ {
-		err := d.decode(
-			fmt.Sprintf("%s[%d]", name, i),
-			dataVal.Index(i).Interface(), val)
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodeMapFromMap(name string, dataVal reflect.Value, val reflect.Value, valMap reflect.Value) error {
-	valType := val.Type()
-	valKeyType := valType.Key()
-	valElemType := valType.Elem()
-
-	// Accumulate errors
-	errors := make([]string, 0)
-
-	// If the input data is empty, then we just match what the input data is.
-	if dataVal.Len() == 0 {
-		if dataVal.IsNil() {
-			if !val.IsNil() {
-				val.Set(dataVal)
-			}
-		} else {
-			// Set to empty allocated value
-			val.Set(valMap)
-		}
-
-		return nil
-	}
-
-	for _, k := range dataVal.MapKeys() {
-		fieldName := fmt.Sprintf("%s[%s]", name, k)
-
-		// First decode the key into the proper type
-		currentKey := reflect.Indirect(reflect.New(valKeyType))
-		if err := d.decode(fieldName, k.Interface(), currentKey); err != nil {
-			errors = appendErrors(errors, err)
-			continue
-		}
-
-		// Next decode the data into the proper type
-		v := dataVal.MapIndex(k).Interface()
-		currentVal := reflect.Indirect(reflect.New(valElemType))
-		if err := d.decode(fieldName, v, currentVal); err != nil {
-			errors = appendErrors(errors, err)
-			continue
-		}
-
-		valMap.SetMapIndex(currentKey, currentVal)
-	}
-
-	// Set the built up map to the value
-	val.Set(valMap)
-
-	// If we had errors, return those
-	if len(errors) > 0 {
-		return &Error{errors}
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodeMapFromStruct(name string, dataVal reflect.Value, val reflect.Value, valMap reflect.Value) error {
-	typ := dataVal.Type()
-	for i := 0; i < typ.NumField(); i++ {
-		// Get the StructField first since this is a cheap operation. If the
-		// field is unexported, then ignore it.
-		f := typ.Field(i)
-		if f.PkgPath != "" {
-			continue
-		}
-
-		// Next get the actual value of this field and verify it is assignable
-		// to the map value.
-		v := dataVal.Field(i)
-		if !v.Type().AssignableTo(valMap.Type().Elem()) {
-			return fmt.Errorf("cannot assign type '%s' to map value field of type '%s'", v.Type(), valMap.Type().Elem())
-		}
-
-		tagValue := f.Tag.Get(d.config.TagName)
-		tagParts := strings.Split(tagValue, ",")
-
-		// Determine the name of the key in the map
-		keyName := f.Name
-		if tagParts[0] != "" {
-			if tagParts[0] == "-" {
-				continue
-			}
-			keyName = tagParts[0]
-		}
-
-		// If "squash" is specified in the tag, we squash the field down.
-		squash := false
-		for _, tag := range tagParts[1:] {
-			if tag == "squash" {
-				squash = true
-				break
-			}
-		}
-		if squash && v.Kind() != reflect.Struct {
-			return fmt.Errorf("cannot squash non-struct type '%s'", v.Type())
-		}
-
-		switch v.Kind() {
-		// this is an embedded struct, so handle it differently
-		case reflect.Struct:
-			x := reflect.New(v.Type())
-			x.Elem().Set(v)
-
-			vType := valMap.Type()
-			vKeyType := vType.Key()
-			vElemType := vType.Elem()
-			mType := reflect.MapOf(vKeyType, vElemType)
-			vMap := reflect.MakeMap(mType)
-
-			err := d.decode(keyName, x.Interface(), vMap)
-			if err != nil {
-				return err
-			}
-
-			if squash {
-				for _, k := range vMap.MapKeys() {
-					valMap.SetMapIndex(k, vMap.MapIndex(k))
-				}
-			} else {
-				valMap.SetMapIndex(reflect.ValueOf(keyName), vMap)
-			}
-
-		default:
-			valMap.SetMapIndex(reflect.ValueOf(keyName), v)
-		}
-	}
-
-	if val.CanAddr() {
-		val.Set(valMap)
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodePtr(name string, data interface{}, val reflect.Value) error {
-	// If the input data is nil, then we want to just set the output
-	// pointer to be nil as well.
-	isNil := data == nil
-	if !isNil {
-		switch v := reflect.Indirect(reflect.ValueOf(data)); v.Kind() {
-		case reflect.Chan,
-			reflect.Func,
-			reflect.Interface,
-			reflect.Map,
-			reflect.Ptr,
-			reflect.Slice:
-			isNil = v.IsNil()
-		}
-	}
-	if isNil {
-		if !val.IsNil() && val.CanSet() {
-			nilValue := reflect.New(val.Type()).Elem()
-			val.Set(nilValue)
-		}
-
-		return nil
-	}
-
-	// Create an element of the concrete (non pointer) type and decode
-	// into that. Then set the value of the pointer to this type.
-	valType := val.Type()
-	valElemType := valType.Elem()
-	if val.CanSet() {
-		realVal := val
-		if realVal.IsNil() || d.config.ZeroFields {
-			realVal = reflect.New(valElemType)
-		}
-
-		if err := d.decode(name, data, reflect.Indirect(realVal)); err != nil {
-			return err
-		}
-
-		val.Set(realVal)
-	} else {
-		if err := d.decode(name, data, reflect.Indirect(val)); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func (d *Decoder) decodeFunc(name string, data interface{}, val reflect.Value) error {
-	// Create an element of the concrete (non pointer) type and decode
-	// into that. Then set the value of the pointer to this type.
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-	if val.Type() != dataVal.Type() {
-		return fmt.Errorf(
-			"'%s' expected type '%s', got unconvertible type '%s'",
-			name, val.Type(), dataVal.Type())
-	}
-	val.Set(dataVal)
-	return nil
-}
-
-func (d *Decoder) decodeSlice(name string, data interface{}, val reflect.Value) error {
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-	dataValKind := dataVal.Kind()
-	valType := val.Type()
-	valElemType := valType.Elem()
-	sliceType := reflect.SliceOf(valElemType)
-
-	valSlice := val
-	if valSlice.IsNil() || d.config.ZeroFields {
-		if d.config.WeaklyTypedInput {
-			switch {
-			// Slice and array we use the normal logic
-			case dataValKind == reflect.Slice, dataValKind == reflect.Array:
-				break
-
-			// Empty maps turn into empty slices
-			case dataValKind == reflect.Map:
-				if dataVal.Len() == 0 {
-					val.Set(reflect.MakeSlice(sliceType, 0, 0))
-					return nil
-				}
-				// Create slice of maps of other sizes
-				return d.decodeSlice(name, []interface{}{data}, val)
-
-			case dataValKind == reflect.String && valElemType.Kind() == reflect.Uint8:
-				return d.decodeSlice(name, []byte(dataVal.String()), val)
-
-			// All other types we try to convert to the slice type
-			// and "lift" it into it. i.e. a string becomes a string slice.
-			default:
-				// Just re-try this function with data as a slice.
-				return d.decodeSlice(name, []interface{}{data}, val)
-			}
-		}
-
-		// Check input type
-		if dataValKind != reflect.Array && dataValKind != reflect.Slice {
-			return fmt.Errorf(
-				"'%s': source data must be an array or slice, got %s", name, dataValKind)
-
-		}
-
-		// If the input value is empty, then don't allocate since non-nil != nil
-		if dataVal.Len() == 0 {
-			return nil
-		}
-
-		// Make a new slice to hold our result, same size as the original data.
-		valSlice = reflect.MakeSlice(sliceType, dataVal.Len(), dataVal.Len())
-	}
-
-	// Accumulate any errors
-	errors := make([]string, 0)
-
-	for i := 0; i < dataVal.Len(); i++ {
-		currentData := dataVal.Index(i).Interface()
-		for valSlice.Len() <= i {
-			valSlice = reflect.Append(valSlice, reflect.Zero(valElemType))
-		}
-		currentField := valSlice.Index(i)
-
-		fieldName := fmt.Sprintf("%s[%d]", name, i)
-		if err := d.decode(fieldName, currentData, currentField); err != nil {
-			errors = appendErrors(errors, err)
-		}
-	}
-
-	// Finally, set the value to the slice we built up
-	val.Set(valSlice)
-
-	// If there were errors, we return those
-	if len(errors) > 0 {
-		return &Error{errors}
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodeArray(name string, data interface{}, val reflect.Value) error {
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-	dataValKind := dataVal.Kind()
-	valType := val.Type()
-	valElemType := valType.Elem()
-	arrayType := reflect.ArrayOf(valType.Len(), valElemType)
-
-	valArray := val
-
-	if valArray.Interface() == reflect.Zero(valArray.Type()).Interface() || d.config.ZeroFields {
-		// Check input type
-		if dataValKind != reflect.Array && dataValKind != reflect.Slice {
-			if d.config.WeaklyTypedInput {
-				switch {
-				// Empty maps turn into empty arrays
-				case dataValKind == reflect.Map:
-					if dataVal.Len() == 0 {
-						val.Set(reflect.Zero(arrayType))
-						return nil
-					}
-
-				// All other types we try to convert to the array type
-				// and "lift" it into it. i.e. a string becomes a string array.
-				default:
-					// Just re-try this function with data as a slice.
-					return d.decodeArray(name, []interface{}{data}, val)
-				}
-			}
-
-			return fmt.Errorf(
-				"'%s': source data must be an array or slice, got %s", name, dataValKind)
-
-		}
-		if dataVal.Len() > arrayType.Len() {
-			return fmt.Errorf(
-				"'%s': expected source data to have length less or equal to %d, got %d", name, arrayType.Len(), dataVal.Len())
-
-		}
-
-		// Make a new array to hold our result, same size as the original data.
-		valArray = reflect.New(arrayType).Elem()
-	}
-
-	// Accumulate any errors
-	errors := make([]string, 0)
-
-	for i := 0; i < dataVal.Len(); i++ {
-		currentData := dataVal.Index(i).Interface()
-		currentField := valArray.Index(i)
-
-		fieldName := fmt.Sprintf("%s[%d]", name, i)
-		if err := d.decode(fieldName, currentData, currentField); err != nil {
-			errors = appendErrors(errors, err)
-		}
-	}
-
-	// Finally, set the value to the array we built up
-	val.Set(valArray)
-
-	// If there were errors, we return those
-	if len(errors) > 0 {
-		return &Error{errors}
-	}
-
-	return nil
-}
-
-func (d *Decoder) decodeStruct(name string, data interface{}, val reflect.Value) error {
-	dataVal := reflect.Indirect(reflect.ValueOf(data))
-
-	// If the type of the value to write to and the data match directly,
-	// then we just set it directly instead of recursing into the structure.
-	if dataVal.Type() == val.Type() {
-		val.Set(dataVal)
-		return nil
-	}
-
-	dataValKind := dataVal.Kind()
-	switch dataValKind {
-	case reflect.Map:
-		return d.decodeStructFromMap(name, dataVal, val)
-
-	case reflect.Struct:
-		// Not the most efficient way to do this but we can optimize later if
-		// we want to. To convert from struct to struct we go to map first
-		// as an intermediary.
-		m := make(map[string]interface{})
-		mval := reflect.Indirect(reflect.ValueOf(&m))
-		if err := d.decodeMapFromStruct(name, dataVal, mval, mval); err != nil {
-			return err
-		}
-
-		result := d.decodeStructFromMap(name, mval, val)
-		return result
-
-	default:
-		return fmt.Errorf("'%s' expected a map, got '%s'", name, dataVal.Kind())
-	}
-}
-
-func (d *Decoder) decodeStructFromMap(name string, dataVal, val reflect.Value) error {
-	dataValType := dataVal.Type()
-	if kind := dataValType.Key().Kind(); kind != reflect.String && kind != reflect.Interface {
-		return fmt.Errorf(
-			"'%s' needs a map with string keys, has '%s' keys",
-			name, dataValType.Key().Kind())
-	}
-
-	dataValKeys := make(map[reflect.Value]struct{})
-	dataValKeysUnused := make(map[interface{}]struct{})
-	for _, dataValKey := range dataVal.MapKeys() {
-		dataValKeys[dataValKey] = struct{}{}
-		dataValKeysUnused[dataValKey.Interface()] = struct{}{}
-	}
-
-	errors := make([]string, 0)
-
-	// This slice will keep track of all the structs we'll be decoding.
-	// There can be more than one struct if there are embedded structs
-	// that are squashed.
-	structs := make([]reflect.Value, 1, 5)
-	structs[0] = val
-
-	// Compile the list of all the fields that we're going to be decoding
-	// from all the structs.
-	type field struct {
-		field reflect.StructField
-		val   reflect.Value
-	}
-	fields := []field{}
-	for len(structs) > 0 {
-		structVal := structs[0]
-		structs = structs[1:]
-
-		structType := structVal.Type()
-
-		for i := 0; i < structType.NumField(); i++ {
-			fieldType := structType.Field(i)
-			fieldKind := fieldType.Type.Kind()
-
-			// If "squash" is specified in the tag, we squash the field down.
-			squash := false
-			tagParts := strings.Split(fieldType.Tag.Get(d.config.TagName), ",")
-			for _, tag := range tagParts[1:] {
-				if tag == "squash" {
-					squash = true
-					break
-				}
-			}
-
-			if squash {
-				if fieldKind != reflect.Struct {
-					errors = appendErrors(errors,
-						fmt.Errorf("%s: unsupported type for squash: %s", fieldType.Name, fieldKind))
-				} else {
-					structs = append(structs, structVal.FieldByName(fieldType.Name))
-				}
-				continue
-			}
-
-			// Normal struct field, store it away
-			fields = append(fields, field{fieldType, structVal.Field(i)})
-		}
-	}
-
-	// for fieldType, field := range fields {
-	for _, f := range fields {
-		field, fieldValue := f.field, f.val
-		fieldName := field.Name
-
-		tagValue := field.Tag.Get(d.config.TagName)
-		tagValue = strings.SplitN(tagValue, ",", 2)[0]
-		if tagValue != "" {
-			fieldName = tagValue
-		}
-
-		rawMapKey := reflect.ValueOf(fieldName)
-		rawMapVal := dataVal.MapIndex(rawMapKey)
-		if !rawMapVal.IsValid() {
-			// Do a slower search by iterating over each key and
-			// doing case-insensitive search.
-			for dataValKey := range dataValKeys {
-				mK, ok := dataValKey.Interface().(string)
-				if !ok {
-					// Not a string key
-					continue
-				}
-
-				if strings.EqualFold(mK, fieldName) {
-					rawMapKey = dataValKey
-					rawMapVal = dataVal.MapIndex(dataValKey)
-					break
-				}
-			}
-
-			if !rawMapVal.IsValid() {
-				// There was no matching key in the map for the value in
-				// the struct. Just ignore.
-				continue
-			}
-		}
-
-		// Delete the key we're using from the unused map so we stop tracking
-		delete(dataValKeysUnused, rawMapKey.Interface())
-
-		if !fieldValue.IsValid() {
-			// This should never happen
-			panic("field is not valid")
-		}
-
-		// If we can't set the field, then it is unexported or something,
-		// and we just continue onwards.
-		if !fieldValue.CanSet() {
-			continue
-		}
-
-		// If the name is empty string, then we're at the root, and we
-		// don't dot-join the fields.
-		if name != "" {
-			fieldName = fmt.Sprintf("%s.%s", name, fieldName)
-		}
-
-		if err := d.decode(fieldName, rawMapVal.Interface(), fieldValue); err != nil {
-			errors = appendErrors(errors, err)
-		}
-	}
-
-	if d.config.ErrorUnused && len(dataValKeysUnused) > 0 {
-		keys := make([]string, 0, len(dataValKeysUnused))
-		for rawKey := range dataValKeysUnused {
-			keys = append(keys, rawKey.(string))
-		}
-		sort.Strings(keys)
-
-		err := fmt.Errorf("'%s' has invalid keys: %s", name, strings.Join(keys, ", "))
-		errors = appendErrors(errors, err)
-	}
-
-	if len(errors) > 0 {
-		return &Error{errors}
-	}
-
-	// Add the unused keys to the list of unused keys if we're tracking metadata
-	if d.config.Metadata != nil {
-		for rawKey := range dataValKeysUnused {
-			key := rawKey.(string)
-			if name != "" {
-				key = fmt.Sprintf("%s.%s", name, key)
-			}
-
-			d.config.Metadata.Unused = append(d.config.Metadata.Unused, key)
-		}
-	}
-
-	return nil
-}
-
-func getKind(val reflect.Value) reflect.Kind {
-	kind := val.Kind()
-
-	switch {
-	case kind >= reflect.Int && kind <= reflect.Int64:
-		return reflect.Int
-	case kind >= reflect.Uint && kind <= reflect.Uint64:
-		return reflect.Uint
-	case kind >= reflect.Float32 && kind <= reflect.Float64:
-		return reflect.Float32
-	default:
-		return kind
-	}
-}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 1b072763fee..dbcf2186cde 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -112,9 +112,6 @@ github.com/mattn/go-isatty
 github.com/mccutchen/go-httpbin/httpbin
 github.com/mccutchen/go-httpbin/httpbin/assets
 github.com/mccutchen/go-httpbin/httpbin/digest
-# github.com/mitchellh/mapstructure v1.1.2
-## explicit
-github.com/mitchellh/mapstructure
 # github.com/nu7hatch/gouuid v0.0.0-20131221200532-179d4d0c4d8d
 ## explicit
 github.com/nu7hatch/gouuid