ALSA: snd-usb-caiaq: remove the unused snd_card_used variable

The snd_card_used variable is only read but never written, remove it.
Signed-off-by: Antonio Ospite <ao2@amarulasolutions.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/caiaq/device.c

@@ -57,7 +57,6 @@ MODULE_SUPPORTED_DEVICE("{{Native Instruments, RigKontrol2},"
 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
 static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for this card */
 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
-static int snd_card_used[SNDRV_CARDS];
 
 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for the caiaq sound device");
@@ -388,7 +387,7 @@ static int create_card(struct usb_device *usb_dev,
 	struct snd_usb_caiaqdev *cdev;
 
 	for (devnum = 0; devnum < SNDRV_CARDS; devnum++)
-		if (enable[devnum] && !snd_card_used[devnum])
+		if (enable[devnum])
 			break;
 
 	if (devnum >= SNDRV_CARDS)