Remove the analysus.reanalyze request from the plugin API

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 796a9aac530c19893a89e0ead9d80dd073d82afe..24d1dfdd4b286fc2a1850cfb67a547dab7771192 100644
--- a/pkg/analysis_server/test/analysis_abstract.dart
+++ b/pkg/analysis_server/test/analysis_abstract.dart
@@ -346,6 +346,12 @@ class TestPluginManager implements PluginManager {
   }
 
   @override
+  Future<Null> restartPlugins() async {
+    // Nothing to restart.
+    return null;
+  }
+
+  @override
   void setAnalysisSetPriorityFilesParams(
       plugin.AnalysisSetPriorityFilesParams params) {
     analysisSetPriorityFilesParams = params;