do not suggest static methods from superclass - fixes #24258

pkg/analysis_server/lib/src/services/completion/dart/static_member_contributor.dart

Index: pkg/analysis_server/lib/src/services/completion/dart/static_member_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/dart/static_member_contributor.dart b/pkg/analysis_server/lib/src/services/completion/dart/static_member_contributor.dart
index 86f841e368322c50dfadcea3b97fb6f36398a648..cb94c1de9f2333d8408e9dab8e8ad5bcda799265 100644
--- a/pkg/analysis_server/lib/src/services/completion/dart/static_member_contributor.dart
+++ b/pkg/analysis_server/lib/src/services/completion/dart/static_member_contributor.dart
@@ -101,12 +101,6 @@ class _SuggestionBuilder extends GeneralizingElementVisitor {
   @override
   visitClassElement(ClassElement element) {
     element.visitChildren(this);
-    element.allSupertypes.forEach((InterfaceType type) {
-      ClassElement childElem = type.element;
-      if (childElem != null) {
-        childElem.visitChildren(this);
-      }
-    });
   }
 
   @override