Get rid of all the library tags.

lib/src/validator/pubspec_field.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // 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.pubspec_field;
-
 import 'dart:async';
 
 import '../entrypoint.dart';
 import '../validator.dart';
 
 /// A validator that checks that the pubspec has valid "author" and "homepage"
 /// fields.
 class PubspecFieldValidator extends Validator {
   PubspecFieldValidator(Entrypoint entrypoint)
     : super(entrypoint);
@@ skipping 80 matching lines @@
       return;
     }
 
     var goodScheme = new RegExp(r'^https?:');
     if (!goodScheme.hasMatch(url)) {
       errors.add('Your pubspec.yaml\'s "$field" field must be an "http:" or '
           '"https:" URL, but it was "$url".');
     }
   }
 }