Twenty Ten theme editing footer

I have this annoying “powered by netfirms” on the footer of my theme, Twenty Ten. Well, actually it is not in the footer file, or any of the theme files as I downloaded all of them and searchd for the word Netfirms… nothing. Where else could that be coming from? I want to remove it. If you want to see what I am talking about check https://promoshowdates.com and look at the very bottom.