Mark on "WP Super Cache is installed but broken."

Hi guys

I haven't used the WP Super Cache plugin for a while but noticed a few of my old pages are failing to load because of this error.

<!-- WP Super Cache is installed but broken. The path to wp-cache-phase1.php in wp-content/advanced-cache.php must be fixed! -->

I don't have WP Super Cache installed.

Obviously it's getting this error from when I used to use it.

Any idea how I can fix it? I assume something in the database thinks I am still using the plugin somewhere?

Thanks :)