How to revoke SSL certificate created during Ghost installation

For technical reasons, I need to revoke the SSL certificate created during installation. Normally, if certbot created it, it would be:

$ sudo certbot revoke --cert-path /etc/letsencrypt/live/

I’ve tried:

$ sudo certbot revoke --cert-path /etc/letsencrypt/

Please help.

I uninstalled Ghost and reinstalled it again and a new certificate was issued.

$ ghost uninstall
$ sudo rm -rf /var/www/
$ sudo service nginx restart