Remove unused fields from analysis_server.

pkg/analysis_server/test/integration/integration_tests.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 test.integration.analysis;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
@@ skipping 625 matching lines @@
    */
   final HashMap<String, Completer> _pendingCommands = <String, Completer>{};
 
   /**
    * Number which should be used to compute the 'id' to send in the next command
    * sent to the server.
    */
   int _nextId = 0;
 
   /**
-   * [StreamController] to which notifications will be sent.
-   */
-  final StreamController _notifications = new StreamController();
-
-  /**
    * Messages which have been exchanged with the server; we buffer these
    * up until the test finishes, so that they can be examined in the debugger
    * or printed out in response to a call to [debugStdio].
    */
   final List<String> _recordedStdio = <String>[];
 
   /**
    * True if we are currently printing out messages exchanged with the server.
    */
   bool _debuggingStdio = false;
@@ skipping 210 matching lines @@
    */
   void _recordStdio(String line) {
     double elapsedTime = _time.elapsedTicks / _time.frequency;
     line = "$elapsedTime: $line";
     if (_debuggingStdio) {
       print(line);
     }
     _recordedStdio.add(line);
   }
 }