Get rid of all the library tags.

test/build/can_specify_output_directory_test.dart

Index: test/build/can_specify_output_directory_test.dart
diff --git a/test/build/can_specify_output_directory_test.dart b/test/build/can_specify_output_directory_test.dart
index 926889b398877de369a4f40fb48b5aa55416164c..7526126b3ad0a54faf49c96a5a068a0ea03e2188 100644
--- a/test/build/can_specify_output_directory_test.dart
+++ b/test/build/can_specify_output_directory_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 'package:path/path.dart' as path;
 import 'package:scheduled_test/scheduled_test.dart';