Fix enable_run_btn input

app_text_classification.py

@@ -222,6 +222,6 @@ def get_demo():
     gr.on(
         triggers=[label.input for label in column_mappings],
         fn=enable_run_btn,
-        inputs=column_mappings,
+        inputs=None,    # FIXME
         outputs=[run_btn],
     )