rpm requires crontabs in order to drop a cron job in.  crontabs requires cronie, which requires an smtp server.  If it weren't for this, we'd have a better chance at a smtp server less and cron less system.  Please consider the usefulness of the cron job, and either split it out into a subpackage, put it in one of our other packages that have our default cron jobs, or just drop it all together.