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

sdk/lib/_internal/pub_generated/test/hosted/remove_removed_transitive_dependency_test.dart

 // Copyright (c) 2012, 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 '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
 
   forBothPubGetAndUpgrade((command) {
-    integration("removes a transitive dependency that's no longer depended "
-        "on", () {
+    integration(
+        "removes a transitive dependency that's no longer depended " "on",
+        () {
       servePackages((builder) {
         builder.serve("foo", "1.0.0", deps: {
           "shared-dep": "any"
         });
         builder.serve("bar", "1.0.0", deps: {
           "shared-dep": "any",
           "bar-dep": "any"
         });
         builder.serve("shared-dep", "1.0.0");
         builder.serve("bar-dep", "1.0.0");
       });
 
       d.appDir({
         "foo": "any",
         "bar": "any"
       }).create();
 
       pubCommand(command);
 
       d.packagesDir({
         "foo": "1.0.0",
         "bar": "1.0.0",
         "shared-dep": "1.0.0",
         "bar-dep": "1.0.0",
       }).validate();
 
-      d.appDir({"foo": "any"}).create();
+      d.appDir({
+        "foo": "any"
+      }).create();
 
       pubCommand(command);
 
       d.packagesDir({
         "foo": "1.0.0",
         "bar": null,
         "shared-dep": "1.0.0",
         "bar-dep": null,
       }).validate();
     });
   });
 }