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

sdk/lib/_internal/pub_generated/test/dart2js/allows_import_in_dart_code_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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';
 import '../serve/utils.dart';
 
 main() {
   initConfig();
   integration("handles imports in the Dart code", () {
-    d.dir("foo", [
-      d.libPubspec("foo", "0.0.1"),
-      d.dir("lib", [
-        d.file("foo.dart", """
+    d.dir(
+        "foo",
+        [d.libPubspec("foo", "0.0.1"), d.dir("lib", [d.file("foo.dart", """
 library foo;
 foo() => 'footext';
-""")
-      ])
-    ]).create();
+""")])]).create();
 
-    d.dir(appPath, [
-      d.appPubspec({
-        "foo": {"path": "../foo"}
-      }),
-      d.dir("lib", [
-        d.file("lib.dart", """
+    d.dir(appPath, [d.appPubspec({
+        "foo": {
+          "path": "../foo"
+        }
+      }), d.dir("lib", [d.file("lib.dart", """
 library lib;
 lib() => 'libtext';
-""")
-      ]),
-      d.dir("web", [
-        d.file("main.dart", """
+""")]), d.dir("web", [d.file("main.dart", """
 import 'package:foo/foo.dart';
 import 'package:myapp/lib.dart';
 void main() {
   print(foo());
   print(lib());
 }
-""")
-      ])
-    ]).create();
+""")])]).create();
 
     pubServe(shouldGetFirst: true);
     requestShouldSucceed("main.dart.js", contains("footext"));
     requestShouldSucceed("main.dart.js", contains("libtext"));
     endPubServe();
   });
 }