Staging: rtl8723bs: remove useless macros

Remove two 'no-op' macros, as well as two related unreferenced macros,
in the staging/rtl8723bs driver.

Signed-off-by: Marco Cesati <marcocesati@gmail.com>
Link: https://lore.kernel.org/r/20210326174145.19427-2-marcocesati@gmail.com


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