It won't let you edit it to be nothing either, so the question still remains - how do you delete it entirely? I just answered a question and realised there was already a comment explaining why my answer wasn't adequate so had to replace it just the word "deleted" which looks pretty silly.
@Dylan Nicholson you can also request a moderator remove it for you; if you send me the link I'll remove it!
:)
You can click the checkmark to mark it as the right answer for future reference.