fix: remove unsupported undo_btn and retry_btn parameters

app.py

@@ -624,9 +624,7 @@ def create_interface() -> gr.Blocks:
                             examples=formatted_examples,
                             type="messages",
                             additional_inputs=additional_inputs if additional_inputs else None,
-                            submit_btn="Send",
-                            undo_btn=None,
-                            retry_btn=None
+                            submit_btn="Send"
                         )
                         
                         # Export functionality using DownloadButton