It is possible for Admins to delete a Group if needed. Once a Group has been deleted, all Posts in the Group will also be deleted. Note that these are are not retrievable once deleted. Follow the steps below to delete a Group.
DELETE A GROUP
Navigate to the desired Group.
Click the three dot icon.
Select Settings.
Select General.
Click the Delete Group link.
Click the Confirm button to delete the Group.
Click the Cancel button if you do not wish to delete the selected Group.