Get rid of all the library tags.

lib/src/frontend/expect_async.dart

 // Copyright (c) 2015, 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 test.frontend.expect_async;
-
 import 'dart:async';
 
 import '../backend/invoker.dart';
 import '../backend/state.dart';
 import 'expect.dart';
 
 /// An object used to detect unpassed arguments.
 const _PLACEHOLDER = const Object();
 
 // Functions used to check how many arguments a callback takes.
@@ skipping 226 matching lines @@
 Function expectAsyncUntil(Function callback, bool isDone(),
     {String id, String reason}) {
   if (Invoker.current == null) {
     throw new StateError(
         "expectAsyncUntil() may only be called within a test.");
   }
 
   return new _ExpectedFunction(callback, 0, -1,
       id: id, reason: reason, isDone: isDone).func;
 }