staging: r8188eu: remove unused aes tables from rtw_security.c

Remove unused aes tables from rtw_security.c and, while at it,
remove unused extern declarations from rtw_security.h.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220220195254.11759-3-straube.linux@gmail.com


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