hso: Fix unused variable warning

Fallout from the TIOCGICOUNT work

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index b154a94..be8cc2a 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -1745,7 +1745,6 @@
 			    unsigned int cmd, unsigned long arg)
 {
 	struct hso_serial *serial =  get_serial_by_tty(tty);
-	void __user *uarg = (void __user *)arg;
 	int ret = 0;
 	D4("IOCTL cmd: %d, arg: %ld", cmd, arg);