Get rid of all the library tags.

test/transformer/runs_a_transformer_on_a_dependency_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.
 
-library pub_tests;
-
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
 main() {
   integration("runs a local transformer on a dependency", () {
     serveBarback();
 
     d.dir("foo", [
       d.pubspec({
@@ skipping 11 matching lines @@
     d.dir(appPath, [
       d.appPubspec({"foo": {"path": "../foo"}}),
     ]).create();
 
     pubGet();
     pubServe();
     requestShouldSucceed("packages/foo/foo.out", "foo.out");
     endPubServe();
   });
 }