remove buttons as keyword arguments

app.py

@@ -288,9 +288,6 @@ def create_demo():
                     title="L-Operator Chat",
                     description="Chat with L-Operator using screenshots and text instructions",
                     examples=load_example_episodes(),
-                    retry_btn="🔄 Retry",
-                    undo_btn="↩️ Undo",
-                    clear_btn="🗑️ Clear",
                     height=600
                 )