Last year we upgraded from 1.9.12 to 2.1.3 (in place upgrade rather than a clean install) and while looking at Site administration >> Plugins >> Filters >> Manage filters I noticed that there was the above error.
This file didn't exist in the 1.9.12 version and doesn't exist in a clean install, and there is no option to delete this in the Manage Filters section. So where is the error coming from?
Looking through the forums any posts on this file appear to be from around version 1.1 / 1.2 circa 2004 which is way before my time in administering the site. Any help appreciated!
PS It's not referenced in our CFG