Get rid of all the library tags.

test/transformer/supports_a_transformer_that_doesnt_return_futures_test.dart

Index: test/transformer/supports_a_transformer_that_doesnt_return_futures_test.dart
diff --git a/test/transformer/supports_a_transformer_that_doesnt_return_futures_test.dart b/test/transformer/supports_a_transformer_that_doesnt_return_futures_test.dart
index 907bc51e218cfe2721c7daa3556c393e02a08764..f84963abffda93cc1105e54a1eb0518685bf5803 100644
--- a/test/transformer/supports_a_transformer_that_doesnt_return_futures_test.dart
+++ b/test/transformer/supports_a_transformer_that_doesnt_return_futures_test.dart
@@ -2,8 +2,6 @@
 // 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';