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

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

Index: sdk/lib/_internal/pub_generated/test/lish/package_validation_has_a_warning_and_is_canceled_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/lish/package_validation_has_a_warning_and_is_canceled_test.dart b/sdk/lib/_internal/pub_generated/test/lish/package_validation_has_a_warning_and_is_canceled_test.dart
deleted file mode 100644
index 314c528e9755e07acea5f084b2e26272081878b8..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub_generated/test/lish/package_validation_has_a_warning_and_is_canceled_test.dart
+++ /dev/null
@@ -1,29 +0,0 @@
-// 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_server.dart';
-import 'package:scheduled_test/scheduled_stream.dart';
-import 'package:scheduled_test/scheduled_test.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('package validation has a warning and is canceled', () {
-    var pkg = packageMap("test_pkg", "1.0.0");
-    pkg["author"] = "Natalie Weizenbaum";
-    d.dir(appPath, [d.pubspec(pkg)]).create();
-
-    var server = new ScheduledServer();
-    var pub = startPublish(server);
-
-    pub.writeLine("n");
-    pub.shouldExit(exit_codes.SUCCESS);
-    pub.stderr.expect(consumeThrough("Package upload canceled."));
-  });
-}