'Role will be removed from database
:param uer_id: Role id to remove object'

@staticmethod
def remove_role(uer_id):

    uer = UsersEventsRoles.query.get(uer_id)
    record_activity('delete_role', role=uer.role, user=uer.user, event_id=uer.event_id)
    delete_from_db(uer, 'UER    deleted')
    flash("You've    successfully    deleted    role.")
