ALSA: aaci: Delete unused variable in aaci_do_suspend

The variable aaci is not used anymore and can be deleted.

Fixes: 792a6c51 ("[ALSA] Fix PM support")
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://lore.kernel.org/r/20240312-aaci-unused-v1-1-09be643f67c2@linutronix.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/arm/aaci.c

@@ -739,7 +739,6 @@ static const struct snd_pcm_ops aaci_capture_ops = {
  */
 static int aaci_do_suspend(struct snd_card *card)
 {
-	struct aaci *aaci = card->private_data;
 	snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
 	return 0;
 }