ALSA: usb: caiaq: audio: Delete two error messages for a failed memory allocation in alloc_urbs()

Omit extra messages for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

[Fixed the unused variable warning by this change as well -- tiwai]
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/caiaq/audio.c

@@ -722,7 +722,6 @@ static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret)
 	int i, frame;
 	struct urb **urbs;
 	struct usb_device *usb_dev = cdev->chip.dev;
-	struct device *dev = caiaqdev_to_dev(cdev);
 	unsigned int pipe;
 
 	pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
@@ -731,7 +730,6 @@ static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret)
 
 	urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
 	if (!urbs) {
-		dev_err(dev, "unable to kmalloc() urbs, OOM!?\n");
 		*ret = -ENOMEM;
 		return NULL;
 	}
@@ -746,7 +744,6 @@ static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret)
 		urbs[i]->transfer_buffer =
 			kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
 		if (!urbs[i]->transfer_buffer) {
-			dev_err(dev, "unable to kmalloc() transfer buffer, OOM!?\n");
 			*ret = -ENOMEM;
 			return urbs;
 		}