1. First, stop and disable the service
sudo systemctl stop etiquetta
sudo systemctl disable etiquetta
2. Remove service file
sudo rm /etc/systemd/system/etiquetta.service
sudo systemctl daemon-reload
3. Remove binary
sudo rm /usr/local/bin/etiquetta
4. Remove data (WARNING: this deletes all your analytics data!)
sudo rm -rf /var/lib/etiquetta
5. Remove user (optional)
sudo userdel etiquetta