prepare boot v2

build-layer

@@ -1,14 +1,6 @@
 #! /bin/sh
 set -ex
 
-mkdir dev
 mknod dev/null    -m 0666 c 1 3
 mknod dev/tty     -m 0666 c 5 0
 mknod dev/console -m 0600 c 5 1
-
-mkdir sys proc bin sbin usr usr/bin usr/sbin
-
-curl -L -o bin/busybox https://busybox.net/downloads/binaries/$busybox_v/busybox-$arch
-chmod +x bin/busybox
-
-chroot . /bin/busybox --install -s