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

sdk/lib/_internal/pub_generated/test/global/deactivate/unknown_package_test.dart

Index: sdk/lib/_internal/pub_generated/test/global/deactivate/unknown_package_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/global/deactivate/unknown_package_test.dart b/sdk/lib/_internal/pub_generated/test/global/deactivate/unknown_package_test.dart
deleted file mode 100644
index d20eaa006f98961911db0b4a8bbff73eb8bc0135..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub_generated/test/global/deactivate/unknown_package_test.dart
+++ /dev/null
@@ -1,18 +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 '../../../lib/src/exit_codes.dart' as exit_codes;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration('errors if the package is not activated', () {
-    serveNoPackages();
-
-    schedulePub(
-        args: ["global", "deactivate", "foo"],
-        error: "No active package foo.",
-        exitCode: exit_codes.DATA);
-  });
-}