I am working on a new design for a site that has been passed down from other developers (who are no longer available to ask). The theme folder has over 20 Page-Types and I'm pretty sure that they all aren't being used.

Is there any way to check which Page-Types are unused so I can delete them and focus on replacing the relevant ones. I could go through the site and manually check but its a rather large site with over 100 pages.

Would also be great if I could somehow generate a table showing the Page-Type and the and the pages its used on

Apologies if this has already been adressed, I did look around before posting.