scripts/create-binary-archive.sh: remove andes/ae350 build directory

The andes-specific files have been moved to generic platform so we
can drop this line.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Anup Patel <anup@brainfault.org>