Why would axiom be included if it is CPU only?
Completeness and consistency mainly. Also, miner control CAN be configured for cpu mining. There are also private GPU miners for axiom.
Actually there aren't, or there shouldn't be.
https://bitcointalk.org/index.php?topic=1135151.0 states that axiom is designed to be CPU only. No big deal, just wasted work for you guys. I just didn't configure it...