The unregistered user petra tried to remove this answer as it really isn't an answer. However, it seems that unregistered users don't get to see a "delete" link below the post. Is this a bug or a feature?
From Shog's accepted answer to What can cause a post to be deleted, and what does that actually mean?:
When can't I delete my own post?
You can't delete your answer if it has been accepted.
You can't delete your question if it has more than two answers, if an answer has a score >= 2, or it has been closed less than 48 hours ago.
You can't delete any of your questions or answers if you haven't registered your account (associated an OpenID with it).