For future reference, please don't delete the contents of a page you've nominated for deletion -- per How To Delete a Page we want to be able to review page's content before agreeing to the deletion. Yes, even something as small as a redirect.
If you were concerned that the redirect would still be used... well, what's wrong with that for a couple hours or days? But if it really worries you, put the delete template at the top of the page (where it should go anyway) and that will keep the redirect from executing.
Oh, and the page had redirect subpages, left over from a page move. I've taken care of them.