drm/xe: Remove unrequired NULL check in xe_sched_job_free_fences

dma_fence_chain_free() can handle NULL input, there is no need for NULL
check by caller.

Signed-off-by: Himal Prasad Ghimiray <[e-mail]>
Reviewed-by: Matthew Brost <[e-mail]>
Reviewed-by: Jagmeet Randhawa <[e-mail]>
Reviewed-by: Nirmoy Das <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
Signed-off-by: Nirmoy Das <[e-mail]>

drivers/gpu/drm/xe/xe_sched_job.c

···
 
 		if (ptrs->lrc_fence)
 			xe_lrc_free_seqno_fence(ptrs->lrc_fence);
-		if (ptrs->chain_fence)
-			dma_fence_chain_free(ptrs->chain_fence);
+		dma_fence_chain_free(ptrs->chain_fence);
 	}
 }