Remove unused reference to SearchEngine

pkg/analysis_server/test/services/completion/dart/completion_contributor_util.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.
 
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/ide_options.dart';
 import 'package:analysis_server/src/provisional/completion/dart/completion_dart.dart';
 import 'package:analysis_server/src/services/completion/completion_core.dart';
 import 'package:analysis_server/src/services/completion/completion_performance.dart';
 import 'package:analysis_server/src/services/completion/dart/completion_manager.dart'
     show DartCompletionRequestImpl, ReplacementRange;
-import 'package:analysis_server/src/services/index/index.dart';
-import 'package:analysis_server/src/services/search/search_engine_internal.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
-import 'package:analyzer/src/dart/analysis/ast_provider_context.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/task/dart.dart';
 import 'package:test/test.dart';
 
 import '../../../abstract_context.dart';
 import '../../correction/flutter_util.dart';
 
 int suggestionComparator(CompletionSuggestion s1, CompletionSuggestion s2) {
   String c1 = s1.completion.toLowerCase();
   String c2 = s2.completion.toLowerCase();
   return c1.compareTo(c2);
 }
 
 abstract class DartCompletionContributorTest extends AbstractContextTest {
   static const String _UNCHECKED = '__UNCHECKED__';
-  Index index;
-  SearchEngineImpl searchEngine;
   String testFile = '/completionTest.dart';
   Source testSource;
   int completionOffset;
   int replacementOffset;
   int replacementLength;
   DartCompletionContributor contributor;
   DartCompletionRequest request;
   List<CompletionSuggestion> suggestions;
 
   /**
@@ skipping 436 matching lines @@
     if (enableNewAnalysisDriver) {
       analysisResult = await driver.getResult(testFile);
       testSource = analysisResult.unit.element.source;
     } else {
       context.analysisPriorityOrder = [testSource];
     }
     CompletionRequestImpl baseRequest = new CompletionRequestImpl(
         analysisResult,
         enableNewAnalysisDriver ? null : context,
         provider,
-        searchEngine,
         testSource,
         completionOffset,
         new CompletionPerformance(),
         options);
 
     // Build the request
     Completer<DartCompletionRequest> requestCompleter =
         new Completer<DartCompletionRequest>();
     DartCompletionRequestImpl
         .from(baseRequest)
@@ skipping 120 matching lines @@
     Source libSource = addSource(path, content);
     if (!enableNewAnalysisDriver) {
       var target = new LibrarySpecificUnit(libSource, libSource);
       context.computeResult(target, RESOLVED_UNIT);
     }
   }
 
   @override
   void setUp() {
     super.setUp();
-    index = createMemoryIndex();
-    searchEngine =
-        new SearchEngineImpl(index, (_) => new AstProviderForContext(context));
     contributor = createContributor();
   }
 }