media: atomisp: Remove empty s_stream() op from CSI subdev

Remove the empty csi2_set_stream() callback and remove the now
empty csi2_video_ops struct.

While at it also remove the empty csi2_core_ops struct.
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_csi2.c

@@ -141,27 +141,6 @@ static int csi2_set_format(struct v4l2_subdev *sd,
 				     &fmt->format);
 }
 
-/*
- * csi2_set_stream - Enable/Disable streaming on the CSI2 module
- * @sd: ISP CSI2 V4L2 subdevice
- * @enable: Enable/disable stream (1/0)
- *
- * Return 0 on success or a negative error code otherwise.
- */
-static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
-{
-	return 0;
-}
-
-/* subdev core operations */
-static const struct v4l2_subdev_core_ops csi2_core_ops = {
-};
-
-/* subdev video operations */
-static const struct v4l2_subdev_video_ops csi2_video_ops = {
-	.s_stream = csi2_set_stream,
-};
-
 /* subdev pad operations */
 static const struct v4l2_subdev_pad_ops csi2_pad_ops = {
 	.enum_mbus_code = csi2_enum_mbus_code,
@@ -172,8 +151,6 @@ static const struct v4l2_subdev_pad_ops csi2_pad_ops = {
 
 /* subdev operations */
 static const struct v4l2_subdev_ops csi2_ops = {
-	.core = &csi2_core_ops,
-	.video = &csi2_video_ops,
 	.pad = &csi2_pad_ops,
 };