How to "clean up" old certs?

[mrfuntime]

Think I found the answer to my question; sorry for the intrusion.

[tedlefter]

Consider posting the answer you found, others could find it useful.

[tedlefter]

I believe this is a side effect of how certbot operates.
https://community.letsencrypt.org/t/how-do-i-clear-the-old-data-from-the-etc-letsencrypt-directory/146667

Looks like this was recently improved upon.
certbot/certbot#4635