s390/dasd: remove debug printk

Remove dasd ioctl debug printk which seems to be a leftover from the
very early days. At least it seems to be quite pointless.
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

drivers/s390/block/dasd_ioctl.c

@@ -575,10 +575,8 @@ int dasd_ioctl(struct block_device *bdev, fmode_t mode,
 	else
 		argp = (void __user *)arg;
 
-	if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) {
-		PRINT_DEBUG("empty data ptr");
+	if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg)
 		return -EINVAL;
-	}
 
 	base = dasd_device_from_gendisk(bdev->bd_disk);
 	if (!base)