Remove magnet from motor?

I need to replace the cracked magnet on 2009 gem car. The old magnet was cracked and easily fell off but the metal ring is stubborn or stuck. This model does not have a screw holding on magnet. Any suggestions on getting that metal ring off. I was hoping to not remove motor to work on it. Thanks!

Paint can opener or screwdriver

thanks, I will give it a whirl.