Yes, you can always add or remove parents from a class, group or community, as long as you are the teacher of the class, the class administrator or room parent. To remove a parent from a classroom:
- Navigate to the class
- Click on the Members tab (located at the top menu in your desktop or in the bottom of your classroom on your phone.)
- Select the user you want to remove
- Click "Edit"
- Select "Remove from class"