Get rid of all the library tags.

lib/src/validator/dependency.dart

Index: lib/src/validator/dependency.dart
diff --git a/lib/src/validator/dependency.dart b/lib/src/validator/dependency.dart
index ccb5e23d38eb60a8f8806622523f73604c940c72..3caa8c264cdd80b45434bd4cfd90a7b4682bdb33 100644
--- a/lib/src/validator/dependency.dart
+++ b/lib/src/validator/dependency.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.validator.dependency;
-
 import 'dart:async';
 
 import 'package:pub_semver/pub_semver.dart';