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

sdk/lib/_internal/pub_generated/test/cache/repair/handles_corrupted_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 'dart:io';
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
   integration('handles a corrupted binstub script', () {
     servePackages((builder) {
-      builder.serve("foo", "1.0.0", contents: [
-        d.dir("bin", [
-          d.file("script.dart", "main(args) => print('ok');")
-        ])
-      ]);
+      builder.serve(
+          "foo",
+          "1.0.0",
+          contents: [
+              d.dir("bin", [d.file("script.dart", "main(args) => print('ok');")])]);
     });
 
     schedulePub(args: ["global", "activate", "foo"]);
 
-    d.dir(cachePath, [
-      d.dir('bin', [
-        d.file(binStubName('script'), 'junk')
-      ])
-    ]).create();
+    d.dir(
+        cachePath,
+        [d.dir('bin', [d.file(binStubName('script'), 'junk')])]).create();
 
-    schedulePub(args: ["cache", "repair"],
+    schedulePub(
+        args: ["cache", "repair"],
         error: contains('Error reading binstub for "script":'));
   });
 }