staging: rtl8723bs: remove unused fields in struct security_priv

remove unused fields in struct security_priv

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/b7ff4cda1cd4cd4e73120f8526ff53a745bcffa8.1616854134.git.fabioaiuto83@gmail.com


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