There is no option to report my own post. It's usually not an issue, because I can edit or remove my post, but not when a thread is locked.
I can see various scenarios where this would be useful. For example, to request that my post is removed when it contains the quote of a response that has been moderated or removed, hence making me look like the bad guy. Or simply to have my own post removed for whatever reason. I could login as another user to report my own post, explaining I'm the same user, but there should be an easier option.