Get rid of all the library tags.

test/transformer/loads_different_configurations_from_the_same_isolate_test.dart

 // Copyright (c) 2014, 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.
 
-library pub_tests;
-
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
 main() {
    integration("loads different configurations from the same isolate", () {
      // If different configurations are loaded from different isolates, a
      // transformer can end up being loaded twice. It's even possible for the
      // second load to use code that's transformed by the first, which is
      // really bad. This tests sets up such a scenario.
@@ skipping 64 matching lines @@
      requestShouldSucceed("first.dart",
          'const TOKEN = "(myapp/first, foo/first in myapp)";');
 
      // foo/second should be transformed by only foo/first.
      requestShouldSucceed("second.dart",
          'const TOKEN = "(myapp/second, (foo/second, foo/first in foo))";');
 
      endPubServe();
    });
 }