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

sdk/lib/_internal/pub_generated/test/run/passes_along_arguments_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';
 
 const SCRIPT = """
 main(List<String> args) {
   print(args.join(" "));
 }
 """;
 
 main() {
   initConfig();
   integration('passes arguments to the spawned script', () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir("bin", [
-        d.file("args.dart", SCRIPT)
-      ])
-    ]).create();
+    d.dir(
+        appPath,
+        [d.appPubspec(), d.dir("bin", [d.file("args.dart", SCRIPT)])]).create();
 
     // Use some args that would trip up pub's arg parser to ensure that it
     // isn't trying to look at them.
     var pub = pubRun(args: ["args", "--verbose", "-m", "--", "help"]);
 
     pub.stdout.expect("--verbose -m -- help");
     pub.shouldExit();
   });
 }