remove pub list caching

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 c748c6f80351abab85a0652118fb90e96bf7e6de..efeb876c67d099704014d1f917fa2a4e60de9489 100644
--- a/pkg/analysis_server/lib/src/socket_server.dart
+++ b/pkg/analysis_server/lib/src/socket_server.dart
@@ -10,9 +10,9 @@ import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analysis_server/src/protocol.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/source/caching_pub_package_map_provider.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
+import 'package:analyzer/source/pub_package_map_provider.dart';
 import 'package:analyzer/src/generated/sdk_io.dart';
 
 /**
@@ -69,7 +69,7 @@ class SocketServer {
     }
 
     analysisServer = new AnalysisServer(serverChannel, resourceProvider,
-        new CachingPubPackageMapProvider(resourceProvider, defaultSdk), index,
+        new PubPackageMapProvider(resourceProvider, defaultSdk), index,
         analysisServerOptions, defaultSdk, instrumentationService,
         rethrowExceptions: false);
     _initializeHandlers(analysisServer);