Let's Encrypt site deletion (Apache on Ubuntu)

Let's Encrypt is brilliant, but why site deletion makes things so complicated is beyond me. I had a bunch of sites running on Apache that Let's Encrypt automagically generated certificates for, which was fine right up until I needed to make one of them unavailable. What follows are the instructions for regenerating the certificates quickly and (relatively) painlessly.

1. Ensure that Apache site configurations are removed from
   /etc/apache2/sites-enabled
   
2. Move unwanted site configurations from
   /etc/apache2/sites-available to a backup location if needed
   
3. Remove all certificate files from
   /etc/letsencrypt/archive/
   /etc/letsencrypt/live/
   /etc/letsencrypt/renewal/
   
4. Restart Apache
   service apache2 restart
   
5. Run letsencrypt