tu can't I'm afraid. You'll just have to make do with making your page blank, saying you're no longer a memeber and never coming back. But if you're really determined to be deleted tu can ask for people to reportar tu because if enough do I think tu should be deleted.
tu shouldn't really care as you'd be dead but tu could get someone to change your Lema to the fact you're deceased o something. Hope it's alrigt if i answered that.