Delete "Not assigned" Contact Group on Samsung Galaxy S9+ On my Samsung Galaxy S9+ in my Contacts app, I have a group called "Not assigned" with 712 contacts.  How do I delete this group and its contacts that are not in other groups?

These contacts are not sync to Google.  The rest of the contacts are.
Not the solution I was looking for, but I tapped on each contact and deleted it.  This required 4 taps per contact.  My wrist was getting sore half way through.  It took me about 1 hour.