Get rid of all the library tags.

test/shelf_proxy_test.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_proxy;
-
 import 'dart:async';
 
 import 'package:http/http.dart' as http;
 import 'package:http/testing.dart';
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:shelf/shelf.dart' as shelf;
 import 'package:shelf/shelf_io.dart' as shelf_io;
 import 'package:shelf_proxy/shelf_proxy.dart';
 
 /// The URI of the server the current proxy server is proxying to.
@@ skipping 233 matching lines @@
 /// Schedules a GET request with [headers] to the proxy server.
 Future<http.Response> get({Map<String, String> headers}) {
   return schedule(() {
     var uri = proxyUri;
     var request = new http.Request('GET', uri);
     if (headers != null) request.headers.addAll(headers);
     request.followRedirects = false;
     return request.send().then(http.Response.fromStream);
   }, 'GET proxy server');
 }