this causes bug when running OpenGL profiler

golang/go#26504
using build.Import is not reliable ...
TODO: must compile resources into go binary

gl21-cube/cube.go

@@ -6,7 +6,6 @@
 package main // import "github.com/go-gl/example/gl21-cube"
 
 import (
-	"go/build"
 	"image"
 	"image/draw"
 	_ "image/png"
@@ -206,26 +205,3 @@ func drawScene() {
 
 	gl.End()
 }
-
-// Set the working directory to the root of Go package, so that its assets can be accessed.
-func init() {
-	dir, err := importPathToDir("github.com/go-gl/example/gl21-cube")
-	if err != nil {
-		log.Fatalln("Unable to find Go package in your GOPATH, it's needed to load assets:", err)
-	}
-	err = os.Chdir(dir)
-	if err != nil {
-		log.Panicln("os.Chdir:", err)
-	}
-}
-
-// importPathToDir resolves the absolute path from importPath.
-// There doesn't need to be a valid Go package inside that import path,
-// but the directory must exist.
-func importPathToDir(importPath string) (string, error) {
-	p, err := build.Import(importPath, "", build.FindOnly)
-	if err != nil {
-		return "", err
-	}
-	return p.Dir, nil
-}

gl41core-cube/cube.go

@@ -7,7 +7,6 @@ package main // import "github.com/go-gl/example/gl41core-cube"
 
 import (
 	"fmt"
-	"go/build"
 	"image"
 	"image/draw"
 	_ "image/png"
@@ -317,26 +316,3 @@ var cubeVertices = []float32{
 	1.0, 1.0, -1.0, 0.0, 0.0,
 	1.0, 1.0, 1.0, 0.0, 1.0,
 }
-
-// Set the working directory to the root of Go package, so that its assets can be accessed.
-func init() {
-	dir, err := importPathToDir("github.com/go-gl/example/gl41core-cube")
-	if err != nil {
-		log.Fatalln("Unable to find Go package in your GOPATH, it's needed to load assets:", err)
-	}
-	err = os.Chdir(dir)
-	if err != nil {
-		log.Panicln("os.Chdir:", err)
-	}
-}
-
-// importPathToDir resolves the absolute path from importPath.
-// There doesn't need to be a valid Go package inside that import path,
-// but the directory must exist.
-func importPathToDir(importPath string) (string, error) {
-	p, err := build.Import(importPath, "", build.FindOnly)
-	if err != nil {
-		return "", err
-	}
-	return p.Dir, nil
-}