Get rid of all the library tags.

test/upgrade/hosted/unlock_if_necessary_test.dart

Index: test/upgrade/hosted/unlock_if_necessary_test.dart
diff --git a/test/upgrade/hosted/unlock_if_necessary_test.dart b/test/upgrade/hosted/unlock_if_necessary_test.dart
index fc25b2e3eb194e7ec026298866bd9a5185cc30f3..ed38adf120863434a24875fd903cc28fb63c5fe0 100644
--- a/test/upgrade/hosted/unlock_if_necessary_test.dart
+++ b/test/upgrade/hosted/unlock_if_necessary_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';