Staging: w35und: remove unused wb35_open() and wb35_close() functions

The functions are not used anywhere so remove them.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>