remove unused cache arguments

pkg/analysis_server/lib/src/domain_completion.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 domain.completion;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
@@ skipping 56 matching lines @@
    * creating a new manager or returning an existing manager as necessary.
    */
   CompletionManager completionManagerFor(AnalysisContext context,
       Source source) {
     if (_manager != null) {
       if (_manager.context == context && _manager.source == source) {
         return _manager;
       }
       _discardManager();
     }
-    _manager =
-        createCompletionManager(context, source, server.searchEngine, null);
+    _manager = createCompletionManager(context, source, server.searchEngine);
     if (context != null) {
       _sourcesChangedSubscription =
           context.onSourcesChanged.listen(sourcesChanged);
     }
     return _manager;
   }
 
   /**
    * If the context associated with the cache has changed or been removed
    * then discard the cache.
    */
   void contextsChanged(ContextsChangedEvent event) {
     if (_manager != null) {
       AnalysisContext context = _manager.context;
       if (event.changed.contains(context) || event.removed.contains(context)) {
         _discardManager();
       }
     }
   }
 
   CompletionManager createCompletionManager(AnalysisContext context,
-      Source source, SearchEngine searchEngine, CompletionCache cache) {
-    return new CompletionManager.create(context, source, searchEngine, cache);
+      Source source, SearchEngine searchEngine) {
+    return new CompletionManager.create(context, source, searchEngine);
   }
 
   @override
   Response handleRequest(Request request) {
     try {
       String requestName = request.method;
       if (requestName == COMPLETION_GET_SUGGESTIONS) {
         return processRequest(request);
       }
     } on RequestFailure catch (exception) {
@@ skipping 90 matching lines @@
    * Discard the sourcesChanged subscription if any
    */
   void _discardManager() {
     if (_sourcesChangedSubscription != null) {
       _sourcesChangedSubscription.cancel();
       _sourcesChangedSubscription = null;
     }
     _manager = null;
   }
 }