WP_cache added weird text to my wp site

not sure what version I’m using — updated somewhat recently but all I can find is text indicating I don’t have 2.7.1

Anyways, I recently tried out the SuperCache and wp-cache plugins and though I’ve now turned them both back off, I still have text at the top of every page of my site (including the admin side) which says “define(‘WP_CACHE’, true); //Added by WP-Cache Manager”.

How can I get rid of this? It’s above the doctype declaration int he page source & not in my header.php.