Bungee-Proxy to normal server

Hey!

Since I have closed down my bungeecord network due to problems with the hoster and downloaded the servers to my computer, I now want to work on the proxy servers on their owns. If I start such a single of those servers, MC prints: If you wish to use IP forwarding, please enable it in your BungeeCord config aswell!

How can I remove those Bungeecord configs to use it as a standalone server?