Deletes the messages in a queue specified by the queue URL.
When you use the PurgeQueue
API, the deleted messages in the
queue can't be retrieved.
When you purge a queue, the message deletion process takes up to 60
seconds. All messages sent to the queue before calling
PurgeQueue
will be deleted; messages sent to the queue while
it is being purged might be deleted. While the queue is being purged,
messages sent to the queue before PurgeQueue
was called
might be received, but will be deleted within the next minute.