staging: rtl8723bs: remove unused debug variables declarations and initialization

remove unused debug variables extern declarations
and containing #ifndef block.

remove initialization as well.

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/d566a6eb49949c1c80df286056b9df6114c8cc97.1619254603.git.fabioaiuto83@gmail.com


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