Revert "Revert "Use native async/await support in pub.""

sdk/lib/_internal/pub_generated/test/global/binstubs/warns_if_not_on_path_test.dart

Index: sdk/lib/_internal/pub_generated/test/global/binstubs/warns_if_not_on_path_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/global/binstubs/warns_if_not_on_path_test.dart b/sdk/lib/_internal/pub_generated/test/global/binstubs/warns_if_not_on_path_test.dart
deleted file mode 100644
index 8e8c19f83cd0c557bc7f891277cd3a273b727b28..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub_generated/test/global/binstubs/warns_if_not_on_path_test.dart
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-import 'package:scheduled_test/scheduled_test.dart';
-
-import '../../descriptor.dart' as d;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration("warns if the binstub directory is not on the path", () {
-    servePackages((builder) {
-      builder.serve("foo", "1.0.0", pubspec: {
-        "executables": {
-          "some-dart-script": "script"
-        }
-      },
-          contents: [
-              d.dir("bin", [d.file("script.dart", "main(args) => print('ok \$args');")])]);
-    });
-
-    schedulePub(
-        args: ["global", "activate", "foo"],
-        error: contains("is not on your path"));
-  });
-}