Get rid of all the library tags.

lib/http_throttle.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 http_throttle;
-
 import 'dart:async';
 
 import 'package:http/http.dart';
 import 'package:pool/pool.dart';
 
 /// A middleware client that throttles the number of concurrent requests.
 ///
 /// As long as the number of requests is within the limit, this works just like
 /// a normal client. If a request is made beyond the limit, the underlying HTTP
 /// request won't be sent until other requests have completed.
@@ skipping 24 matching lines @@
             headers: response.headers,
             isRedirect: response.isRedirect,
             persistentConnection: response.persistentConnection,
             reasonPhrase: response.reasonPhrase);
       });
     });
   }
 
   void close() => _inner.close();
 }