cd /etc/letsencrypt && rm -rf live/<domain> renewal/<domain>.conf
Another way:
certbot delete

all of a certificate’s relevant files can be removed from the system with the
deletesubcommand:
cd /etc/letsencrypt && rm -rf live/<domain> renewal/<domain>.conf
Another way:
certbot delete

all of a certificate’s relevant files can be removed from the system with the
deletesubcommand: