drm: rcar-du: Remove wait field from rcar_du_device structure

The field is a left-over from the switch to the atomic commit helper.
It's unused, remove it.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

drivers/gpu/drm/rcar-du/rcar_du_drv.c

@@ -318,8 +318,6 @@ static int rcar_du_probe(struct platform_device *pdev)
 	if (rcdu == NULL)
 		return -ENOMEM;
 
-	init_waitqueue_head(&rcdu->commit.wait);
-
 	rcdu->dev = &pdev->dev;
 	rcdu->info = of_device_get_match_data(rcdu->dev);
 

drivers/gpu/drm/rcar-du/rcar_du_drv.h

@@ -98,11 +98,6 @@ struct rcar_du_device {
 	unsigned int vspd1_sink;
 
 	struct rcar_du_lvdsenc *lvds[RCAR_DU_MAX_LVDS];
-
-	struct {
-		wait_queue_head_t wait;
-		u32 pending;
-	} commit;
 };
 
 static inline bool rcar_du_has(struct rcar_du_device *rcdu,