misc/cgo/testplugin: remove skip in TestIssue25756pie

Though this was a problem for Go 1.17,
it appears not to be a problem on tip.

This reverts change made in CL 321349.

For #46239.

Change-Id: Ie4d6649fbabce3bb2c1cf04d97760ba6ceadaca5
Reviewed-on: https://go-review.googlesource.com/c/go/+/369752
Run-TryBot: Dmitri Shuralyov <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Trust: Dmitri Shuralyov <[email protected]>

Author: dmitshur

misc/cgo/testplugin/plugin_test.go

@@ -265,10 +265,6 @@ func TestIssue25756(t *testing.T) {
 
 // Test with main using -buildmode=pie with plugin for issue #43228
 func TestIssue25756pie(t *testing.T) {
-	if os.Getenv("GO_BUILDER_NAME") == "darwin-arm64-11_0-toothrot" {
-		t.Skip("broken on darwin/arm64 builder in sharded mode; see issue 46239")
-	}
-
 	goCmd(t, "build", "-buildmode=plugin", "-o", "life.so", "./issue25756/plugin")
 	goCmd(t, "build", "-buildmode=pie", "-o", "issue25756pie.exe", "./issue25756/main.go")
 	run(t, "./issue25756pie.exe")