The updated version of inn in updates.redhat.com, inn-2.2.1, still requires cleanfeed in order to install. But cleanfeed installs in the wrong place relative to inn. Inn expects the filtering rules to be in /usr/bin/filter/filter_inn.pl, but cleanfeed installs them in /usr/lib/news/bin/control, which is not anywhere where inn is using it. So why not make it so that cleanfeed is *not* a requirement to install inn, since it's not being used.
Fixed in the devel tree (next rawhide)