The job submission userspace ABI doesn't support this and there are no
plans to implement it, so all of this code is dead and can be removed.
Reviewed-by: NDmitry Osipenko <digetx@gmail.com>
Tested-by: NDmitry Osipenko <digetx@gmail.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>