media: cobalt: Drop superfluous ioctl PCM ops

snd_cobalt_pcm_ioctl() does nothing but calling the default handler.
Now PCM core accepts NULL as the default ioctl ops, so let's drop
altogether.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/pci/cobalt/cobalt-alsa-pcm.c

@@ -237,12 +237,6 @@ static int snd_cobalt_pcm_capture_close(struct snd_pcm_substream *substream)
 	return 0;
 }
 
-static int snd_cobalt_pcm_ioctl(struct snd_pcm_substream *substream,
-		     unsigned int cmd, void *arg)
-{
-	return snd_pcm_lib_ioctl(substream, cmd, arg);
-}
-
 static int snd_cobalt_pcm_prepare(struct snd_pcm_substream *substream)
 {
 	struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
@@ -450,7 +444,6 @@ snd_pcm_uframes_t snd_cobalt_pcm_pb_pointer(struct snd_pcm_substream *substream)
 static const struct snd_pcm_ops snd_cobalt_pcm_capture_ops = {
 	.open		= snd_cobalt_pcm_capture_open,
 	.close		= snd_cobalt_pcm_capture_close,
-	.ioctl		= snd_cobalt_pcm_ioctl,
 	.prepare	= snd_cobalt_pcm_prepare,
 	.trigger	= snd_cobalt_pcm_trigger,
 	.pointer	= snd_cobalt_pcm_pointer,
@@ -459,7 +452,6 @@ static const struct snd_pcm_ops snd_cobalt_pcm_capture_ops = {
 static const struct snd_pcm_ops snd_cobalt_pcm_playback_ops = {
 	.open		= snd_cobalt_pcm_playback_open,
 	.close		= snd_cobalt_pcm_playback_close,
-	.ioctl		= snd_cobalt_pcm_ioctl,
 	.prepare	= snd_cobalt_pcm_pb_prepare,
 	.trigger	= snd_cobalt_pcm_pb_trigger,
 	.pointer	= snd_cobalt_pcm_pb_pointer,