ALSA: pcm: remove redundant variable runtime

An earlier commit removed the access to variable runtime
and we are now left with unused variable that is redundant,
so remove it.

Cleans up the clang warning: Value stored to 'runtime' is never read

Fixes: e11f0f90a626 ("ALSA: pcm: remove SNDRV_PCM_IOCTL1_INFO internal command")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/pcm_native.c

@@ -195,7 +195,6 @@ EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
 
 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
 {
-	struct snd_pcm_runtime *runtime;
 	struct snd_pcm *pcm = substream->pcm;
 	struct snd_pcm_str *pstr = substream->pstr;
 
@@ -211,7 +210,6 @@ int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
 	info->subdevices_count = pstr->substream_count;
 	info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 	strlcpy(info->subname, substream->name, sizeof(info->subname));
-	runtime = substream->runtime;
 
 	return 0;
 }