diff --git a/lib/attach/topic2.dart b/lib/attach/topic2.dart
deleted file mode 100644
index ff67304..0000000
--- a/lib/attach/topic2.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-// import 'package:roslibdart/core/request.dart';
-
-// class Topic2 {
-//   String name;
-//   String type;
-
-//   Topic2({required this.name, required this.type});
-
-//   String publish(dynamic message) {
-//     var req = Request(
-//       op: "publish",
-//       id: 
-//       topic: name,
-//       msg: message, 
-//     );
-//     return req.toString();
-//   }
-
-// }