media: zoran: drop two obsolete prototypes from zoran_device.h

These overlay-related functions no longer exist, so drop them
from the header.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/pci/zoran/zoran_device.h

@@ -25,8 +25,6 @@ void jpeg_codec_sleep(struct zoran *zr, int sleep);
 int jpeg_codec_reset(struct zoran *zr);
 
 /* zr360x7 access to raw capture */
-void zr36057_overlay(struct zoran *zr, int on);
-void write_overlay_mask(struct zoran_fh *fh, struct v4l2_clip *vp, int count);
 void zr36057_set_memgrab(struct zoran *zr, int mode);
 int wait_grab_pending(struct zoran *zr);