usb: misc: sisusbvga: sisusb: don't print error when allocating urb fails

kmalloc will print enough information in case of failure.

Signed-off-by: Wolfram Sang <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/misc/sisusbvga/sisusb.c

···
 	/* Allocate URBs */
 	sisusb->sisurbin = usb_alloc_urb(0, GFP_KERNEL);
 	if (!sisusb->sisurbin) {
-		dev_err(&sisusb->sisusb_dev->dev, "Failed to allocate URBs\n");
 		retval = -ENOMEM;
 		goto error_3;
 	}
···
 	for (i = 0; i < sisusb->numobufs; i++) {
 		sisusb->sisurbout[i] = usb_alloc_urb(0, GFP_KERNEL);
 		if (!sisusb->sisurbout[i]) {
-			dev_err(&sisusb->sisusb_dev->dev,
-					"Failed to allocate URBs\n");
 			retval = -ENOMEM;
 			goto error_4;
 		}