Fixes: https://pagure.io/koji/issue/3939
Commit f5d6c816 fixes this pull-request
Pull-Request has been merged by tkopecek
Just for posterity, I note that we still have a reference to it in read_config_files(), but it's only invoked for py2, so should be ok still.
See also: #1150
Fixes: https://pagure.io/koji/issue/3939