Update app.py

app.py

@@ -9,7 +9,7 @@ import os
 from pywebio import start_server
 from pywebio.input import file_upload, input
 from pywebio.output import put_text, put_image, put_row, put_column, use_scope, put_buttons, put_scope
-from pywebio.session import run_js, set_env
+from pywebio.session import set_env
 import base64
 import threading