how to remove hassio and supervisor

It's been a while since this gist was written. In the meantime the package homeassistant-supervised apt 
package was introduced for debian based systems. If you used that way the first thing you should do use 
the normal package uninstaller with something like: (sudo) apt remove homeassistant-supervised 
If for some reason that doesn't work proceed with the below instructions for a manual cleanup.

1) stop services:
sudo systemctl stop hassio-supervisor.service
sudo systemctl stop hassio-apparmor.service

2) disable services:
sudo systemctl disable hassio-supervisor.service
sudo systemctl disable hassio-apparmor.service

3) remove services:
sudo rm -rf /etc/systemd/system/hassio-supervisor.service
sudo rm -rf /etc/systemd/system/hassio-apparmor.service

4) removing folders:
sudo rm -rf /usr/sbin/hassio-supervisor
sudo rm -rf /usr/sbin/hassio-apparmor

5) remove containers/images

This is what I did to remove Home Assistant 2023 Core from my system:

sudo systemctl stop hass.service
sudo systemctl disable hass.service
sudo rm -rf /etc/systemd/system/multi-user.target.wants/hass.service
sudo userdel -r homeassistant
sudo rm -rf /srv/homeassistant