You can't delete it yourself...Its there to haunt you for the duration of your stay...
Why would you want to delete it? It wasn't a stupid question, non are. Others may learn from this post just as you have. We try to encourage that people "Search & Read" before posting new question.
Ha! I said "We" as if I'm part of the administration of this website. I'm not...Just a vistor like yourself.
Cheers!
- Dan