Remove uses of the old plugin model from the analysis server

pkg/analysis_server/test/analysis_abstract.dart

Index: pkg/analysis_server/test/analysis_abstract.dart
diff --git a/pkg/analysis_server/test/analysis_abstract.dart b/pkg/analysis_server/test/analysis_abstract.dart
index 89ed2bc2843b55f00d2a0815cbc249d10843aa0f..89f8e262de41170dad18f6ebc0cffdd95d32357c 100644
--- a/pkg/analysis_server/test/analysis_abstract.dart
+++ b/pkg/analysis_server/test/analysis_abstract.dart
@@ -12,8 +12,6 @@ import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
 import 'package:analysis_server/src/plugin/notification_manager.dart';
 import 'package:analysis_server/src/plugin/plugin_manager.dart';
-import 'package:analysis_server/src/plugin/server_plugin.dart';
-import 'package:analysis_server/src/provisional/completion/dart/completion_plugin.dart';
 import 'package:analyzer/context/context_root.dart' as analyzer;
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
@@ -105,8 +103,6 @@ class AbstractAnalysisTest {
     handleSuccessfulRequest(request);
   }
 
-  void addServerPlugins(List<Plugin> plugins) {}
-
   String addTestFile(String content) {
     addFile(testFile, content);
     this.testCode = content;
@@ -117,12 +113,8 @@ class AbstractAnalysisTest {
     //
     // Collect plugins
     //
-    ServerPlugin serverPlugin = new ServerPlugin();
     List<Plugin> plugins = <Plugin>[];
     plugins.addAll(AnalysisEngine.instance.requiredPlugins);
-    plugins.add(serverPlugin);
-    plugins.add(dartCompletionPlugin);
-    addServerPlugins(plugins);
     //
     // Process plugins
     //
@@ -142,7 +134,6 @@ class AbstractAnalysisTest {
         serverChannel,
         resourceProvider,
         packageMapProvider,
-        serverPlugin,
         options,
         new DartSdkManager(resourceProvider.convertPath('/'), true),
         InstrumentationService.NULL_SERVICE);