staging: rtl8188eu: remove unused macros and definitions

Removep unused macros and definitions from rtw_security.h leftover
from previous cleanup patches.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20200929062847.23985-1-straube.linux@gmail.com


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