gogrep: remove unused *types.Info field from the matcher (#204)

internal/mvdan.cc/gogrep/kludge.go

@@ -3,18 +3,14 @@ package gogrep
 import (
 	"go/ast"
 	"go/token"
-	"go/types"
 )
 
 // This is an ugly way to use gogrep as a library.
 // It can go away when there will be another option.
 
 // Parse creates a gogrep pattern out of a given string expression.
 func Parse(fset *token.FileSet, expr string) (*Pattern, error) {
-	m := matcher{
-		fset: fset,
-		Info: &types.Info{},
-	}
+	m := matcher{fset: fset}
 	node, err := m.parseExpr(expr)
 	if err != nil {
 		return nil, err

internal/mvdan.cc/gogrep/match.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"go/ast"
 	"go/token"
-	"go/types"
 )
 
 type matcher struct {
@@ -16,8 +15,6 @@ type matcher struct {
 	// node values recorded by name, excluding "_" (used only by the
 	// actual matching phase)
 	values map[string]ast.Node
-
-	*types.Info
 }
 
 type varInfo struct {