Remove the auto-discovery of plugins

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 24d1dfdd4b286fc2a1850cfb67a547dab7771192..89ed2bc2843b55f00d2a0815cbc249d10843aa0f 100644
--- a/pkg/analysis_server/test/analysis_abstract.dart
+++ b/pkg/analysis_server/test/analysis_abstract.dart
@@ -374,9 +374,4 @@ class TestPluginManager implements PluginManager {
     fail('Unexpected invocation of stopAll');
     return null;
   }
-
-  @override
-  void whitelistEverything() {
-    fail('Unexpected invocation of whitelistEverything');
-  }
 }