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

sdk/lib/_internal/pub_generated/test/global/binstubs/binstub_runs_global_run_if_no_snapshot_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.
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
   integration("the binstubs runs pub global run if there is no snapshot", () {
-    d.dir("foo", [
-      d.pubspec({
+    d.dir("foo", [d.pubspec({
         "name": "foo",
         "executables": {
           "foo-script": "script"
         }
       }),
-      d.dir("bin", [
-        d.file("script.dart", "main() => print('ok');")
-      ])
-    ]).create();
+          d.dir("bin", [d.file("script.dart", "main() => print('ok');")])]).create();
 
     // Path packages are mutable, so no snapshot is created.
-    schedulePub(args: ["global", "activate", "--source", "path", "../foo"],
+    schedulePub(
+        args: ["global", "activate", "--source", "path", "../foo"],
         output: contains("Installed executable foo-script."));
 
-    d.dir(cachePath, [
-      d.dir("bin", [
-        d.matcherFile(binStubName("foo-script"),
-            contains("pub global run foo:script"))
-      ])
-    ]).validate();
+    d.dir(
+        cachePath,
+        [
+            d.dir(
+                "bin",
+                [
+                    d.matcherFile(
+                        binStubName("foo-script"),
+                        contains("pub global run foo:script"))])]).validate();
   });
 }