feat(sys-apps/module-init-tools) delete the ebuilds as kmod is being used

No more need for this ebuild to even hang around anymore, kmod handles
it all now.
feat(sys-apps/busybox) delete ebuilds

We are using the ebuilds in coreos-overlay/sys-apps/busybox instead
already, so this one is just duplicated for no reason.
Merge pull request #16 from gregkh/remove_deps

Remove unneeded ebuilds from sys-apps/