staging: rtl8723bs: remove unused macros, arrays and an inline function def

remove unused macros, arrays and a function definition.
Many of these facilities were used in removed private
aes encryption.

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/ada64bfc622dbfe6d4ff03c46dff48b25ebc641e.1620372584.git.fabioaiuto83@gmail.com


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