Get rid of all the library tags.

lib/src/authentication_challenge.dart

 // Copyright (c) 2015, 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_paser.authentication_challenge;
-
 import 'dart:collection';
 
 import 'package:string_scanner/string_scanner.dart';
 
 import 'case_insensitive_map.dart';
 import 'scan.dart';
 import 'utils.dart';
 
 /// A single challenge in a WWW-Authenticate header, parsed as per [RFC 2617][].
 ///
@@ skipping 127 matching lines @@
     }
 
     scanner.scan(whitespace);
   }
 
   /// Creates a new challenge value with [scheme] and [parameters].
   AuthenticationChallenge(this.scheme, Map<String, String> parameters)
       : parameters = new UnmodifiableMapView(
             new CaseInsensitiveMap.from(parameters));
 }