drm/nouveau/gr/gf100-: remove dtor

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c

@@ -2031,8 +2031,6 @@ gf100_gr_dtor(struct nvkm_gr *base)
 {
 	struct gf100_gr *gr = gf100_gr(base);
 
-	if (gr->func->dtor)
-		gr->func->dtor(gr);
 	kfree(gr->data);
 
 	nvkm_falcon_del(&gr->gpccs.falcon);

drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.h

@@ -157,7 +157,6 @@ struct gf100_gr_func_zbc {
 };
 
 struct gf100_gr_func {
-	void (*dtor)(struct gf100_gr *);
 	void (*oneinit_tiles)(struct gf100_gr *);
 	void (*oneinit_sm_id)(struct gf100_gr *);
 	int (*init)(struct gf100_gr *);