Get rid of all the library tags.

lib/src/barback/excluding_transformer.dart

 // Copyright (c) 2014, 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.excluding_transformer;
-
 import 'dart:async';
 
 import 'package:barback/barback.dart';
 
 import 'transformer_config.dart';
 
 /// Decorates an inner [Transformer] and handles including and excluding
 /// primary inputs.
 class ExcludingTransformer extends Transformer {
   /// If [config] defines includes or excludes, wraps [inner] in an
@@ skipping 40 matching lines @@
   Future declareOutputs(DeclaringTransform transform) =>
       (_inner as DeclaringTransformer).declareOutputs(transform);
 }
 
 class _LazyExcludingTransformer extends _DeclaringExcludingTransformer
     implements LazyTransformer {
   _LazyExcludingTransformer(DeclaringTransformer inner,
           TransformerConfig config)
       : super(inner, config);
 }