Fix the second error

app.py

@@ -123,10 +123,7 @@ with gr.Blocks(title="Matrix Prime 8B Chat") as demo:
                     scale=7,
                 ),
                 submit_btn="Send",
-                stop_btn="Stop",
-                retry_btn="Retry",
-                undo_btn="Undo",
-                clear_btn="Clear",
+                stop_btn="Stop"
             )