media: cx231xx: Remove vidioc_s_ctrl callback

The driver has been converted to the control framework in the past:
commit 88b6ffe ("[media] cx231xx-417: convert to the control
framework").

This function is never called, the core will only use the control
framework instead.

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Tested-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Author: ribalda

drivers/media/usb/cx231xx/cx231xx-417.c

@@ -1538,20 +1538,6 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
 	return 0;
 }
 
-static int vidioc_s_ctrl(struct file *file, void *priv,
-				struct v4l2_control *ctl)
-{
-	struct cx231xx *dev = video_drvdata(file);
-	struct v4l2_subdev *sd;
-
-	dprintk(3, "enter vidioc_s_ctrl()\n");
-	/* Update the A/V core */
-	v4l2_device_for_each_subdev(sd, &dev->v4l2_dev)
-		v4l2_s_ctrl(NULL, sd->ctrl_handler, ctl);
-	dprintk(3, "exit vidioc_s_ctrl()\n");
-	return 0;
-}
-
 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
 					struct v4l2_fmtdesc *f)
 {
@@ -1627,7 +1613,6 @@ static const struct v4l2_ioctl_ops mpeg_ioctl_ops = {
 	.vidioc_enum_input	 = cx231xx_enum_input,
 	.vidioc_g_input		 = cx231xx_g_input,
 	.vidioc_s_input		 = cx231xx_s_input,
-	.vidioc_s_ctrl		 = vidioc_s_ctrl,
 	.vidioc_g_pixelaspect	 = vidioc_g_pixelaspect,
 	.vidioc_g_selection	 = vidioc_g_selection,
 	.vidioc_querycap	 = cx231xx_querycap,