Remove more libraries directives from server

pkg/analysis_server/lib/plugin/edit/fix/fix.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.
 
 /**
  * Support for client code that extends the analysis server by adding new fix
  * contributors.
  *
  * Plugins can register fix contributors. The registered contributors will be
  * used to get fixes any time a client issues an 'edit.getFixes' request.
  *
  * If a plugin wants to add fixes, it should implement the class
  * [FixContributor] and then register the contributor by including code like the
  * following in the plugin's registerExtensions method:
  *
  *     @override
  *     void registerExtensions(RegisterExtension registerExtension) {
  *       ...
  *       registerExtension(
  *           FIX_CONTRIBUTOR_EXTENSION_POINT_ID,
  *           new MyFixContributor());
  *       ...
  *     }
  */
-library analysis_server.plugin.edit.fix.fix;
-
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:plugin/plugin.dart';
 
 /**
  * The identifier of the extension point that allows plugins to register fix
  * contributors. The object used as an extension must be a [FixContributor].
  */
 final String FIX_CONTRIBUTOR_EXTENSION_POINT_ID = Plugin.join(
     ServerPlugin.UNIQUE_IDENTIFIER,
     ServerPlugin.FIX_CONTRIBUTOR_EXTENSION_POINT);