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

apt remove homeassistant-supervised

added sudo and it removed some additional dependencies:

sogeniusio@srv:~$ sudo apt remove homeassistant-supervised
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  homeassistant-supervised
0 upgraded, 0 newly installed, 1 to remove and 28 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 157313 files and directories currently installed.)
Removing homeassistant-supervised (1.0.2) ...
[info] Undo divert on remove
Removing 'diversion of /etc/NetworkManager/NetworkManager.conf to /etc/NetworkManager/NetworkManager.conf.real by homeassistant-supervised'
Removing 'diversion of /etc/NetworkManager/system-connections/default to /etc/NetworkManager/system-connections/default.real by homeassistant-supervised'
Removing 'diversion of /etc/docker/daemon.json to /etc/docker/daemon.json.real by homeassistant-supervised'
Removing 'diversion of /etc/network/interfaces to /etc/network/interfaces.real by homeassistant-supervised'

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