media: v4l2-subdev: Remove g_pixelaspect operation

There are no consumers or implementations left in tree for the subdevice
operation g_pixelaspect, delete it.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20250705083741.77517-4-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

Author: Niklas Söderlund

include/media/v4l2-subdev.h

@@ -460,8 +460,6 @@ enum v4l2_subdev_pre_streamon_flags {
  *	but use the v4l2_subdev_enable_streams() and
  *	v4l2_subdev_disable_streams() helpers.
  *
- * @g_pixelaspect: callback to return the pixelaspect ratio.
- *
  * @s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
  *	can adjust @size to a lower value and must not write more data to the
  *	buffer starting at @data than the original value of @size.
@@ -491,7 +489,6 @@ struct v4l2_subdev_video_ops {
 	int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
 	int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
 	int (*s_stream)(struct v4l2_subdev *sd, int enable);
-	int (*g_pixelaspect)(struct v4l2_subdev *sd, struct v4l2_fract *aspect);
 	int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf,
 			   unsigned int *size);
 	int (*pre_streamon)(struct v4l2_subdev *sd, u32 flags);