Remove the old index.

pkg/analysis_server/test/search/abstract_search_domain.dart

Index: pkg/analysis_server/test/search/abstract_search_domain.dart
diff --git a/pkg/analysis_server/test/search/abstract_search_domain.dart b/pkg/analysis_server/test/search/abstract_search_domain.dart
index bd9eaf7d7510384992aed82fa3e1b272a9b6a4b6..dc83c5a96cdf6d682571c0cf5e3bb77c84d69994 100644
--- a/pkg/analysis_server/test/search/abstract_search_domain.dart
+++ b/pkg/analysis_server/test/search/abstract_search_domain.dart
@@ -8,8 +8,6 @@ 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/search/search_domain.dart';
-import 'package:analysis_server/src/services/index/index.dart'
-    show Index, createMemoryIndex;
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:test/test.dart';
 
@@ -37,11 +35,6 @@ class AbstractSearchDomainTest extends AbstractAnalysisTest {
     findResult(kind, testFile, offset, length, false);
   }
 
-  @override
-  Index createIndex() {
-    return createMemoryIndex();
-  }
-
   void findResult(SearchResultKind kind, String file, int offset, int length,
       bool expected) {
     for (SearchResult result in results) {