A women’s bantamweight title bout between champion  Kayla Harrison and former two-time titleholder  Amanda Nunes was scheduled for the UFC 324 co-main event next weekend, but an  injury forced Harrison out of the fight.  Harrison underwent neck surgery on Wednesday to repair herniated discs and released a video statement on Thursday from the hospital.  “Hi guys. I just wanted to give a bit of an update on my end. This is a tough one,” she said in the video