As per Board Rules (extracted below), we do not delete accounts. You can, however, edit your own content.
Think Before You Post
The posts on this forum are available for all the world to see. If you don't want all the world to see what you have to say, don't post it. We are not likely to remove a thread/post because you later regret writing it. If you are all fired up about something, take a walk or have a cup of tea before posting something you will regret.
The forum admins are unable to delete accounts. Users can delete their own content by editing posts.