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

sdk/lib/_internal/pub_generated/test/snapshot/doesnt_snapshot_path_dependency_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:path/path.dart' as p;
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
   integration("doesn't create a snapshot for a path dependency", () {
-    d.dir("foo", [
-      d.libPubspec("foo", "1.2.3"),
-      d.dir("bin", [
-        d.dir("bin", [d.file("hello.dart", "void main() => print('hello!');")])
-      ])
-    ]).create();
+    d.dir(
+        "foo",
+        [
+            d.libPubspec("foo", "1.2.3"),
+            d.dir(
+                "bin",
+                [
+                    d.dir(
+                        "bin",
+                        [d.file("hello.dart", "void main() => print('hello!');")])])]).create();
 
-    d.appDir({"foo": {"path": "../foo"}}).create();
+    d.appDir({
+      "foo": {
+        "path": "../foo"
+      }
+    }).create();
 
     pubGet();
 
     d.nothing(p.join(appPath, '.pub', 'bin')).validate();
   });
 }