func deleteFromQueueOnce(q *sqs.Queue, del chan string, timeout time.Duration) error {
batch := assembleDeleteMessageBatch(del, timeout)
if len(batch) > 0 {
log.Printf("deleting %d messages from q\n", len(batch))
_, err := q.DeleteMessageBatch(batch)
if err != nil {
return err
}
}
return nil
}
