registration email address

I deleted one of my user identities.  Whhen I tried to re-register I recieved an error saying I couldn't use the same email address. "The e-mail address that you entered is already in use. Please enter a different e-mail address".

Is there a to remove the address from the database (easily)?

Chad

https://www.nopcommerce.com/boards/t/314/registration-problems-creating-new-users.aspx