Remove old index and search implementations.

pkg/analysis_server/lib/src/socket_server.dart

Index: pkg/analysis_server/lib/src/socket_server.dart
diff --git a/pkg/analysis_server/lib/src/socket_server.dart b/pkg/analysis_server/lib/src/socket_server.dart
index 9c0a8093ea1402f412929565f4d01244d704e877..c3f3facffb96b0d5b05ec22b1c65afbde8f216c3 100644
--- a/pkg/analysis_server/lib/src/socket_server.dart
+++ b/pkg/analysis_server/lib/src/socket_server.dart
@@ -9,8 +9,6 @@ import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/channel/channel.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analysis_server/src/services/index/index.dart';
-import 'package:analysis_server/src/services/index/local_file_index.dart';
-import 'package:analysis_server/src/services/index2/index2.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:analyzer/plugin/embedded_resolver_provider.dart';
@@ -88,19 +86,14 @@ class SocketServer {
 
     Index index = null;
     if (!analysisServerOptions.noIndex) {
-      index = createLocalFileIndex();
-      index.contributors = serverPlugin.indexContributors;
-      index.run();
+      index = createMemoryIndex();
     }
 
-    Index2 index2 = createMemoryIndex2();
-
     analysisServer = new AnalysisServer(
         serverChannel,
         resourceProvider,
         new PubPackageMapProvider(resourceProvider, defaultSdk),
         index,
-        index2,
         serverPlugin,
         analysisServerOptions,
         defaultSdkCreator,