How do I delete Images I have uploaded?

Hey all,

First time posting, long time reader. Anyway I uploaded some images I was going to post in some character sheets but realized they are weirdly framed. How do I delete them?

Note: This isn't for my avatar, it is image files I have uploaded.

You can't. Why would you need to?

(Also, AFAIK, images that aren't linked from the wiki or forum are deleted periodically.)