internal/devbox: stop setting LD_LIBRARY_PATH and LIBRARY_PATH (#1799)

As discussed, these cause way more problems than they solve. Now that we
support multiple and non-default package outputs, other programs should
be able to find libraries as long as they use the wrapped clang/gcc from
the stdenv.

Fixes #1752.
Fixes #1798.

Author: gcurtis

internal/devbox/devbox.go

@@ -961,8 +961,6 @@ func (d *Devbox) computeEnv(ctx context.Context, usePrintDevEnvCache bool) (map[
 
 	debug.Log("computed environment PATH is: %s", env["PATH"])
 
-	d.setCommonHelperEnvVars(env)
-
 	if !d.pure {
 		// preserve the original XDG_DATA_DIRS by prepending to it
 		env["XDG_DATA_DIRS"] = envpath.JoinPathLists(env["XDG_DATA_DIRS"], os.Getenv("XDG_DATA_DIRS"))
@@ -1201,14 +1199,6 @@ var ignoreDevEnvVar = map[string]bool{
 	"UID":                true,
 }
 
-// setCommonHelperEnvVars sets environment variables that are required by some
-// common setups (e.g. gradio, rust)
-func (d *Devbox) setCommonHelperEnvVars(env map[string]string) {
-	profileLibDir := filepath.Join(d.projectDir, nix.ProfilePath, "lib")
-	env["LD_LIBRARY_PATH"] = envpath.JoinPathLists(profileLibDir, env["LD_LIBRARY_PATH"])
-	env["LIBRARY_PATH"] = envpath.JoinPathLists(profileLibDir, env["LIBRARY_PATH"])
-}
-
 func (d *Devbox) ProjectDirHash() string {
 	h, _ := cachehash.Bytes([]byte(d.projectDir))
 	return h