remove unused cache arguments

pkg/analysis_server/test/services/completion/completion_computer_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 test.services.completion.suggestion;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/completion_manager.dart';
@@ skipping 26 matching lines @@
   // would therefore not wait for microtask callbacks that are scheduled after
   // invoking this method.
   return new Future.delayed(Duration.ZERO, () => pumpEventQueue(times - 1));
 }
 
 @ReflectiveTestCase()
 class DartCompletionManagerTest extends AbstractSingleUnitTest {
   Index index;
   SearchEngineImpl searchEngine;
   Source source;
-  CompletionCache cache;
   CompletionPerformance perf;
   DartCompletionManager manager;
   MockCompletionComputer computer1;
   MockCompletionComputer computer2;
   CompletionSuggestion suggestion1;
   CompletionSuggestion suggestion2;
 
   void resolveLibrary() {
     context.resolveCompilationUnit(
         source,
         context.computeLibraryElement(source));
   }
 
   @override
   void setUp() {
     super.setUp();
     index = createLocalMemoryIndex();
     searchEngine = new SearchEngineImpl(index);
     source = addSource('/does/not/exist.dart', '');
-    cache = null;
     perf = new CompletionPerformance();
-    manager =
-        new DartCompletionManager.create(context, searchEngine, source, cache);
+    manager = new DartCompletionManager.create(context, searchEngine, source);
     suggestion1 = new CompletionSuggestion(
         CompletionSuggestionKind.INVOCATION,
         CompletionRelevance.DEFAULT,
         "suggestion1",
         1,
         1,
         false,
         false);
     suggestion2 = new CompletionSuggestion(
         CompletionSuggestionKind.IDENTIFIER,
@@ skipping 109 matching lines @@
   @override
   Future<bool> computeFull(DartCompletionRequest request) {
     this.request = request;
     fullCount++;
     if (fullSuggestion != null) {
       request.suggestions.add(fullSuggestion);
     }
     return new Future.value(fullSuggestion != null);
   }
 }