staging: vt6655: device_free_info() warn: variable dereferenced before check

pDevice is never NULL when this function is called remove the check.

This fixes smatch warning
drivers/staging/vt6655/device_main.c:1023 device_free_info() warn: variable dereferenced
before check 'pDevice' (see line 1021)
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: kbuild@01.org
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/device_main.c

@@ -1008,9 +1008,6 @@ static void device_free_info(struct vnt_private *pDevice)
 {
 	struct net_device *dev = pDevice->dev;
 
-	if (!pDevice)
-		return;
-
 	ASSERT(pDevice);
 //2008-0714-01<Add>by chester
 	device_release_WPADEV(pDevice);