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

sdk/lib/_internal/pub_generated/test/global/run/runs_path_script_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 '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
   integration('runs a script in a path package', () {
-    d.dir("foo", [
-      d.libPubspec("foo", "1.0.0"),
-      d.dir("bin", [
-        d.file("foo.dart", "main() => print('ok');")
-      ])
-    ]).create();
+    d.dir(
+        "foo",
+        [
+            d.libPubspec("foo", "1.0.0"),
+            d.dir("bin", [d.file("foo.dart", "main() => print('ok');")])]).create();
 
     schedulePub(args: ["global", "activate", "--source", "path", "../foo"]);
 
     var pub = pubRun(global: true, args: ["foo"]);
     pub.stdout.expect("ok");
     pub.shouldExit();
   });
 }