drm/xe: Remove set_job_timeout_ms() from exec_queue_ops

This function is no longer used as the job_timeout is now
updated prior to calling queue_ops.init().

Signed-off-by: Brian Welty <brian.welty@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>