enable timeout test on Windows

Author: linzhp

tests/core/go_test/timeout_test.go

@@ -3,7 +3,6 @@ package timeout_test
 import (
 	"os"
 	"path/filepath"
-	"runtime"
 	"strings"
 	"testing"
 
@@ -37,10 +36,6 @@ func neverTerminates() {
 }
 
 func TestTimeout(t *testing.T) {
-	if runtime.GOOS == "windows" {
-		t.Skip("stack traces on timeouts are not yet supported on Windows")
-	}
-
 	var stderr string
 	if err := bazel_testing.RunBazel("test", "//:timeout_test", "--test_timeout=3", "--test_arg=-test.v"); err == nil {
 		t.Fatal("expected bazel test to fail")