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

sdk/lib/_internal/pub_generated/test/cache/repair/handles_orphaned_binstub_test.dart

 // 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.
 
 library pub_tests;
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 const _ORPHANED_BINSTUB = """
 #!/usr/bin/env sh
 # This file was created by pub v0.1.2-3.
 # Package: foo
 # Version: 1.0.0
 # Executable: foo-script
 # Script: script
 dart "/path/to/.pub-cache/global_packages/foo/bin/script.dart.snapshot" "\$@"
 """;
 
 main() {
   initConfig();
   integration('handles an orphaned binstub script', () {
-    d.dir(cachePath, [
-      d.dir('bin', [
-        d.file(binStubName('script'), _ORPHANED_BINSTUB)
-      ])
-    ]).create();
+    d.dir(
+        cachePath,
+        [d.dir('bin', [d.file(binStubName('script'), _ORPHANED_BINSTUB)])]).create();
 
-    schedulePub(args: ["cache", "repair"], error: allOf([
-      contains('Binstubs exist for non-activated packages:'),
-      contains('From foo: foo-script')
-    ]));
+    schedulePub(
+        args: ["cache", "repair"],
+        error: allOf(
+            [
+                contains('Binstubs exist for non-activated packages:'),
+                contains('From foo: foo-script')]));
   });
 }