'Delete an rdf pair.
:param array: the array serial number
:param device_id: the device id
:param rdf_group: the rdf group'

@coordination.synchronized('emc-rg-{rdf_group}')
def delete_rdf_pair(self, array, device_id, rdf_group):

    params = {'half': 'false', 'force': 'true', 'symforce': 'false', 'star': 'false', 'bypass': 'false'}
    resource_name = ('%(rdf_num)s/volume/%(device_id)s' % {'rdf_num': rdf_group, 'device_id': device_id})
    self.delete_resource(array, REPLICATION, 'rdf_group', resource_name, private='/private', params=params)
