staging: vt6656: struct vnt_rcb remove unused in_use.

The variable merely toggles true to false and is unused.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/130a4078-2502-a381-46c4-b473815e153b@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>