Get rid of all the library tags.

lib/src/request.dart

 // Copyright (c) 2013, 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 request;
-
 import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:http_parser/http_parser.dart';
 
 import 'base_request.dart';
 import 'byte_stream.dart';
 import 'utils.dart';
 
 /// An HTTP request where the entire request body is known in advance.
@@ skipping 137 matching lines @@
   set _contentType(MediaType value) {
     headers['content-type'] = value.toString();
   }
 
   /// Throw an error if this request has been finalized.
   void _checkFinalized() {
     if (!finalized) return;
     throw new StateError("Can't modify a finalized Request.");
   }
 }