Get rid of all the library tags.

lib/src/base_client.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 base_client;
-
 import 'dart:async';
 import 'dart:convert';
 import 'dart:typed_data';
 
 import 'base_request.dart';
 import 'client.dart';
 import 'exception.dart';
 import 'request.dart';
 import 'response.dart';
 import 'streamed_response.dart';
@@ skipping 163 matching lines @@
     }
     if (url is String) url = Uri.parse(url);
     throw new ClientException("$message.", url);
   }
 
   /// Closes the client and cleans up any resources associated with it. It's
   /// important to close each client when it's done being used; failing to do so
   /// can cause the Dart process to hang.
   void close() {}
 }