Use native async/await support in pub.

sdk/lib/_internal/pub_generated/test/transformer/runs_a_transformer_on_a_dependency_test.dart

Index: sdk/lib/_internal/pub_generated/test/transformer/runs_a_transformer_on_a_dependency_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/transformer/runs_a_transformer_on_a_dependency_test.dart b/sdk/lib/_internal/pub_generated/test/transformer/runs_a_transformer_on_a_dependency_test.dart
deleted file mode 100644
index c19f18091ffee20456b40cc2c0534e8c9922640f..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub_generated/test/transformer/runs_a_transformer_on_a_dependency_test.dart
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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.
-
-library pub_tests;
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-import '../serve/utils.dart';
-
-main() {
-  initConfig();
-  withBarbackVersions("any", () {
-    integration("runs a local transformer on a dependency", () {
-      d.dir("foo", [d.pubspec({
-          "name": "foo",
-          "version": "0.0.1",
-          "transformers": ["foo/transformer"]
-        }),
-            d.dir(
-                "lib",
-                [
-                    d.file("transformer.dart", REWRITE_TRANSFORMER),
-                    d.file("foo.txt", "foo")])]).create();
-
-      d.dir(appPath, [d.appPubspec({
-          "foo": {
-            "path": "../foo"
-          }
-        }),]).create();
-
-      createLockFile('myapp', sandbox: ['foo'], pkg: ['barback']);
-
-      pubServe();
-      requestShouldSucceed("packages/foo/foo.out", "foo.out");
-      endPubServe();
-    });
-  });
-}