Revert "cmd/go: evaluate root symlink in matchPackages"

This reverts CL 380057.

Reason for revert: appears to have broken x/tools tests on macOS.

Change-Id: If1340bcb9b78f7271798c4dd923553e33db7f72e
Reviewed-on: https://go-review.googlesource.com/c/go/+/380294
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>

src/cmd/go/internal/modload/search.go

@@ -54,11 +54,6 @@ func matchPackages(ctx context.Context, m *search.Match, tags map[string]bool, f
 	)
 
 	walkPkgs := func(root, importPathRoot string, prune pruning) {
-		// Follow root if it's a symlink so path == root comparisons don't
-		// spuriously fail when root is a symlink and it points to path.
-		if r, err := filepath.EvalSymlinks(root); err == nil {
-			root = r
-		}
 		root = filepath.Clean(root)
 		err := fsys.Walk(root, func(path string, fi fs.FileInfo, err error) error {
 			if err != nil {

src/cmd/go/testdata/script/work_root_is_symlink.txt

@@ -1,20 +0,0 @@
-# Test that cmd/go follows the symlink and properly determines
-# the module boundary when the working directory is a symlink.
-
-[!symlink] skip
-
-symlink worksym -> workspace
-cd worksym
-go list all
-stdout example.com/workspace
-
--- workspace/go.work --
-go 1.18
-
-use .
--- workspace/go.mod --
-module example.com/workspace
-
-go  1.18
--- workspace/pkg.go --
-package workspace