Remove Puppet Class from Child Hostgroup?

Hi,
Running Satellite 6.2.15. Is there a way to remove selected puppet classes from a child hostgroup, where the child has inherited the class from the parent hostgroup?
I created a child for virtual machines where the partition table and a few other configurations need to be different from the physical machines for the same project. Specifically, the parent hostgroup has a class that configures NIC bonding, and I don't want to run that on the hosts in the child hostgroup since they're virtual and only have one NIC. The GUI doesn't allow it ... looking at hammer and at the API I don't see a way. When I use the API to show the child hostgroup, the puppet classes array is empty.
Thanks