Get rid of all the library tags.

test/snapshot/doesnt_load_irrelevant_transformers_test.dart

Index: test/snapshot/doesnt_load_irrelevant_transformers_test.dart
diff --git a/test/snapshot/doesnt_load_irrelevant_transformers_test.dart b/test/snapshot/doesnt_load_irrelevant_transformers_test.dart
index 99ca2bc24e96bae346bd965650cc800649b13f0d..340901cc66638527e80cd8842486256e270e1249 100644
--- a/test/snapshot/doesnt_load_irrelevant_transformers_test.dart
+++ b/test/snapshot/doesnt_load_irrelevant_transformers_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 p;
 import 'package:scheduled_test/scheduled_test.dart';