ALSA: info: Remove unused function declarations

These declarations is never used since beginning of git history.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230807141513.31440-1-yuehaibing@huawei.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/info.h

@@ -118,8 +118,6 @@ struct snd_info_entry *snd_info_create_card_entry(struct snd_card *card,
 					     const char *name,
 					     struct snd_info_entry *parent);
 void snd_info_free_entry(struct snd_info_entry *entry);
-int snd_info_store_text(struct snd_info_entry *entry);
-int snd_info_restore_text(struct snd_info_entry *entry);
 
 int snd_info_card_create(struct snd_card *card);
 int snd_info_card_register(struct snd_card *card);