Remove the old index.

pkg/analysis_server/test/analysis/notification_implemented_test.dart

Index: pkg/analysis_server/test/analysis/notification_implemented_test.dart
diff --git a/pkg/analysis_server/test/analysis/notification_implemented_test.dart b/pkg/analysis_server/test/analysis/notification_implemented_test.dart
index f7f9a29d8081d4d11b91f899d3c0fb6bf211fd0c..8ec29ce50a549f90327876ff39f04a6f3ad033f3 100644
--- a/pkg/analysis_server/test/analysis/notification_implemented_test.dart
+++ b/pkg/analysis_server/test/analysis/notification_implemented_test.dart
@@ -7,7 +7,6 @@ import 'dart:async';
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_constants.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
-import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ -93,11 +92,6 @@ class AnalysisNotificationImplementedTest extends AbstractAnalysisTest {
     }
   }
 
-  @override
-  Index createIndex() {
-    return createMemoryIndex();
-  }
-
   /**
    * Subscribe for `IMPLEMENTED` and wait for the notification.
    */