Get rid of all the library tags.

lib/src/cascade.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 shelf.cascade;
-
 import 'dart:async';
 
 import 'handler.dart';
 import 'response.dart';
 
 /// A typedef for [Cascade._shouldCascade].
 typedef bool _ShouldCascade(Response response);
 
 /// A helper that calls several handlers in sequence and returns the first
 /// acceptable response.
@@ skipping 65 matching lines @@
 
 /// Computes the [Cascade._shouldCascade] function based on the user's
 /// parameters.
 Function _computeShouldCascade(
     Iterable<int> statusCodes, Function shouldCascade) {
   if (shouldCascade != null) return shouldCascade;
   if (statusCodes == null) statusCodes = [404, 405];
   statusCodes = statusCodes.toSet();
   return (response) => statusCodes.contains(response.statusCode);
 }