If you used the certbot utility to obtain your free SSL certificate from Let’s Encrypt, but now wish to delete it, there’s a very simple way to do it. Follow along with us as we show you how to delete a site’s certificate data with certbot on Linux.
Option 1. To delete a site in certbot, run the following command:
# certbot delete
Enter the number that corresponds to the site you wish to delete, then press Enter.
Option 2. The other option is to skip the prompt and just specify your domain name in the
certbot delete command:
# certbot delete --cert-name example.com
Note that you will still need to manually delete the related SSL lines from your Apache or NGINX configuration file(s), which were previously added automatically by certbot.