There is no way to delete an account (its not as trivial as it may seem). Why do you want to delete it? If you are concerned about people googling you, just change any personal information in your profile.
I want to delte this account too, but the site does not allow too... I was stupid and made themes out of pictures I got on google... (REALLY stupid of me) and I didn't know this was illegal on this page so I had to delete it all. And I'm not able to create such pictures myself. So I really don't need this account anymore though, and I don't want people to could google it.( I have changed my profile info, but account name stand still).
I think it's kinda bad with pages allowing not to delete your profile. Mine should be deleted for my ripping. I'm sorry that..