Nothing uses this anymore with the removal of the ack vs. commit code.
Remove the field and just encode zeroes into place in the request
encoding.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Reviewed-by: NIlya Dryomov <idryomov@gmail.com>
Signed-off-by: NIlya Dryomov <idryomov@gmail.com>