remove unused cache arguments

pkg/analysis_server/lib/src/services/completion/completion_manager.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 services.completion.computer;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
@@ skipping 39 matching lines @@
    * The controller used for returning completion results.
    */
   StreamController<CompletionResult> controller;
 
   CompletionManager(this.context, this.source);
 
   /**
    * Create a manager for the given request.
    */
   factory CompletionManager.create(AnalysisContext context, Source source,
-      SearchEngine searchEngine, CompletionCache cache) {
+      SearchEngine searchEngine) {
     if (context != null) {
       if (AnalysisEngine.isDartFileName(source.shortName)) {
-        return new DartCompletionManager.create(
-            context,
-            searchEngine,
-            source,
-            cache);
+        return new DartCompletionManager.create(context, searchEngine, source);
       }
       if (AnalysisEngine.isHtmlFileName(source.shortName)) {
         //TODO (danrubel) implement
 //        return new HtmlCompletionManager(context, searchEngine, source, offset);
       }
     }
     return new NoOpCompletionManager(source);
   }
 
   /**
@@ skipping 144 matching lines @@
    */
   final String name;
 
   /**
    * The elapse time or `null` if undefined.
    */
   final Duration elapsed;
 
   OperationPerformance(this.name, this.elapsed);
 }