test: delete file

frontend/app_flowy/packages/appflowy_editor/test/extensions/text_node_extensions_test.dart

@@ -1,10 +0,0 @@
-import 'package:appflowy_editor/appflowy_editor.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  group('TextNodeExtension::', () {
-    test('description', () {
-      final selecion = Selection.single(path: [0, 1, 2], startOffset: 0);
-    });
-  });
-}