Remove Home Assistant / Firewall rules

I setup a testing version of HA on Docker (a while ago) using this script: I’d now like to clean it off that system (as I have it installed on a different server). I’ve stopped/disabled hassio-apparmor.service and hassio-supervisor.service and all the containers are stopped. I still have iptable rules. What do I need to do to get those rules removed?

You managed to disable the firewall in HA?