'Remove the volume from the SG.
If the volume is not the last in the storage group,
remove the volume from the SG and leave the sg on the array.
:param serial_number: array serial number
:param device_id: volume device id
:param volume_name: volume name
:param storagegroup_name: storage group name
:param move: flag to indicate a move instead of remove
:param extra_specs: extra specifications'

def _multiple_vols_in_sg(self, serial_number, device_id, storagegroup_name, volume_name, extra_specs, move):

    if move:
        self.add_volume_to_default_storage_group(serial_number, device_id, volume_name, extra_specs, src_sg=storagegroup_name)
    else:
        self.remove_vol_from_storage_group(serial_number, device_id, storagegroup_name, volume_name, extra_specs)
    LOG.debug('Volume    %(volume_name)s    successfully    moved/    removed    from    storage    group    %(sg)s.', {'volume_name': volume_name, 'sg': storagegroup_name})
    num_vol_in_sg = self.rest.get_num_vols_in_sg(serial_number, storagegroup_name)
    LOG.debug('There    are    %(num_vol)d    volumes    remaining    in    the    storage    group    %(sg_name)s.', {'num_vol': num_vol_in_sg, 'sg_name': storagegroup_name})
