V4L/DVB: cpia_usb: remove unneeded variable

This is just a cleanup patch.  We never use the "udev" variable so I
have removed it.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cpia_usb.c

@@ -584,7 +584,6 @@ static void cpia_disconnect(struct usb_interface *intf)
 {
 	struct cam_data *cam = usb_get_intfdata(intf);
 	struct usb_cpia *ucpia;
-	struct usb_device *udev;
 
 	usb_set_intfdata(intf, NULL);
 	if (!cam)
@@ -606,8 +605,6 @@ static void cpia_disconnect(struct usb_interface *intf)
 	if (waitqueue_active(&ucpia->wq_stream))
 		wake_up_interruptible(&ucpia->wq_stream);
 
-	udev = interface_to_usbdev(intf);
-
 	ucpia->curbuff = ucpia->workbuff = NULL;
 
 	vfree(ucpia->buffers[2]);