
{    The purpose of this routine is to remove completed requests from the
{ PP or the unit request queue.  In addition to delinking the request,
{ the request buffer is FREEd.
{
{    request_id: (input,output) This parameter specifies the identifier of
{      the request to delink.  Upon return the ring 1 identifier fields
{      are no longer valid.
{
{    status: (output) This parameter returns the results of the request.
