Get rid of all the library tags.

test/cache/repair/recompiles_snapshots_test.dart

Index: test/cache/repair/recompiles_snapshots_test.dart
diff --git a/test/cache/repair/recompiles_snapshots_test.dart b/test/cache/repair/recompiles_snapshots_test.dart
index 8ed964697223fab3036dfc0e961468118ad29e55..a831c8caaa7ac9e4fce6a5bc1bbea3a059e22181 100644
--- a/test/cache/repair/recompiles_snapshots_test.dart
+++ b/test/cache/repair/recompiles_snapshots_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';