Get rid of all the library tags.

lib/src/io_server.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 shelf.io_server;
-
 import 'dart:async';
 
 import 'dart:io';
 
 import '../shelf_io.dart';
 import 'handler.dart';
 import 'server.dart';
 
 /// A [Server] backed by a `dart:io` [HttpServer].
 class IOServer implements Server {
@@ skipping 34 matching lines @@
     if (_mounted) {
       throw new StateError("Can't mount two handlers for the same server.");
     }
     _mounted = true;
 
     serveRequests(server, handler);
   }
 
   Future close() => server.close();
 }