1. Go to Users and Groups.
2. Click on the Groups tab.
3. Check the box/es of the group/s you want to delete.
4. Click on the vertical ellipsis/kebab menu on the top of the column.
5. Then select Remove.
6. In the pop-up confirming this action, click on OK to proceed.
Wait for the page to load again and check if the group has been deleted.