Anyway, besides simply abandoning the profile by never logging in again, you can, if you really, really, really want the profile to be deleted (and have some reason that makes it so important that simply leaving it is not enough) you can contact Carlie, the admin of this site, and ask her to delete it. You should give that good reason too.
Since the name will not be made free by deleting anyway, simply leaving the site is often the best way to "delete" a profile.
This is so in case you have any second thoughts about leaving and you still have your profile. Having the account deleted is just more work for poor Carlie to do