Store the async-await compiled pub code directly in the repo.

sdk/lib/_internal/pub_generated/test/lish/preview_package_validation_has_no_warnings_test.dart

Index: sdk/lib/_internal/pub_generated/test/lish/preview_package_validation_has_no_warnings_test.dart
diff --git a/sdk/lib/_internal/pub/test/lish/preview_package_validation_has_no_warnings_test.dart b/sdk/lib/_internal/pub_generated/test/lish/preview_package_validation_has_no_warnings_test.dart
similarity index 77%
copy from sdk/lib/_internal/pub/test/lish/preview_package_validation_has_no_warnings_test.dart
copy to sdk/lib/_internal/pub_generated/test/lish/preview_package_validation_has_no_warnings_test.dart
index 66f092ebd4e7a5f19de1078797e0c43924c94cfc..46d0dfa69e67c511c1e255f02394ba0ff7878857 100644
--- a/sdk/lib/_internal/pub/test/lish/preview_package_validation_has_no_warnings_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/lish/preview_package_validation_has_no_warnings_test.dart
@@ -1,27 +1,18 @@
-// Copyright (c) 2013, 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 'package:scheduled_test/scheduled_server.dart';
 import 'package:scheduled_test/scheduled_stream.dart';
-
 import '../../lib/src/exit_codes.dart' as exit_codes;
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
-
 main() {
   initConfig();
   setUp(d.validPackage.create);
-
   integration('preview package validation has no warnings', () {
     var pkg = packageMap("test_pkg", "1.0.0");
     pkg["author"] = "Natalie Weizenbaum <nweiz@google.com>";
     d.dir(appPath, [d.pubspec(pkg)]).create();
-
     var server = new ScheduledServer();
     var pub = startPublish(server, args: ['--dry-run']);
-
     pub.shouldExit(exit_codes.SUCCESS);
     pub.stderr.expect(consumeThrough('Package has 0 warnings.'));
   });