Remove the old index.

pkg/analysis_server/test/search/type_hierarchy_test.dart

Index: pkg/analysis_server/test/search/type_hierarchy_test.dart
diff --git a/pkg/analysis_server/test/search/type_hierarchy_test.dart b/pkg/analysis_server/test/search/type_hierarchy_test.dart
index 1d16aa422eea865dc237c94c982568ff897f66f9..cf4e4809721ed670c1d102356ec0a2535509192b 100644
--- a/pkg/analysis_server/test/search/type_hierarchy_test.dart
+++ b/pkg/analysis_server/test/search/type_hierarchy_test.dart
@@ -7,7 +7,6 @@ import 'dart:async';
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/search/search_domain.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';
@@ -23,10 +22,6 @@ main() {
 @reflectiveTest
 class GetTypeHierarchyTest extends AbstractAnalysisTest {
   static const String requestId = 'test-getTypeHierarchy';
-  @override
-  Index createIndex() {
-    return createMemoryIndex();
-  }
 
   @override
   void setUp() {