ALSA: pcm: Remove unused SNDRV_PCM_IOCTL1_{FALSE,TRUE} defines

Both SNDRV_PCM_IOCTL1_FALSE and SNDRV_PCM_IOCTL1_TRUE are unused and have in
fact never been used (at least as far as the git history goes).
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/pcm.h

@@ -94,9 +94,6 @@ struct snd_pcm_ops {
 #define SNDRV_PCM_DEVICES	8
 #endif
 
-#define SNDRV_PCM_IOCTL1_FALSE		((void *)0)
-#define SNDRV_PCM_IOCTL1_TRUE		((void *)1)
-
 #define SNDRV_PCM_IOCTL1_RESET		0
 #define SNDRV_PCM_IOCTL1_INFO		1
 #define SNDRV_PCM_IOCTL1_CHANNEL_INFO	2