Get rid of all the library tags.

test/serve/gets_first_if_dependency_is_not_installed_test.dart

Index: test/serve/gets_first_if_dependency_is_not_installed_test.dart
diff --git a/test/serve/gets_first_if_dependency_is_not_installed_test.dart b/test/serve/gets_first_if_dependency_is_not_installed_test.dart
index 3962ca80cab8cacc22faaf8552533a0d4adc5f23..0447867c7e27909498f3eb901b9e469ef7f9804a 100644
--- a/test/serve/gets_first_if_dependency_is_not_installed_test.dart
+++ b/test/serve/gets_first_if_dependency_is_not_installed_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:pub/src/io.dart';
 import 'package:scheduled_test/scheduled_test.dart';