staging: rtl8723bs: remove unused WAKEUP_GPIO_IDX macro definition

remove unused WAKEUP_GPIO_IDX macro definition.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/6bf5ddf3e4465840cdfcca79a524645cdaf0104d.1623756906.git.fabioaiuto83@gmail.com


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