If you decided to compile your keymap file directly into the kernel back at the end of chapter 6, then you strictly speaking don't need to run this loadkeys script, since the kernel has already setup the keymap for you. You can still run it if you want, it isn't going to hurt you. It could even be beneficial to keep it in case you run a lot of different kernels and don't remember or want to compile the keymap into every kernel you lay your hands on.
If you decided you don't need to, or don't want to use the loadkeys script, remove the /etc/rc.d/rcsysinit.d/S70loadkeys symlink.