ALSA: cmipci: Drop stale variable assignment

Since the recent code refactoring using devres, the variable cm in
snd_cmipci_probe() is no longer referred.

Fixes: 87e082ad ("ALSA: cmipci: Allocate resources with device-managed APIs")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/cc6383a2-cafb-ffe7-0b4f-27a310a1005c@intel.com
Link: https://lore.kernel.org/r/20211112103137.9504-1-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/cmipci.c

@@ -3218,7 +3218,6 @@ static int snd_cmipci_probe(struct pci_dev *pci,
 {
 	static int dev;
 	struct snd_card *card;
-	struct cmipci *cm;
 	int err;
 
 	if (dev >= SNDRV_CARDS)
@@ -3229,10 +3228,9 @@ static int snd_cmipci_probe(struct pci_dev *pci,
 	}
 
 	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
-				sizeof(*cm), &card);
+				sizeof(struct cmipci), &card);
 	if (err < 0)
 		return err;
-	cm = card->private_data;
 	
 	switch (pci->device) {
 	case PCI_DEVICE_ID_CMEDIA_CM8738: