Roll back old initialization

Author: volbil

app.py

@@ -1,6 +1,5 @@
 from server import config
-from server import sio
 from server import app
 
 if __name__ == "__main__":
-    sio.run(app, debug=config.debug, host=config.host, port=config.port)
+    app.run(debug=config.debug, host=config.host, port=config.port)