cca3b21d35
split_live_squashfs_layers moved /usr out of filesystem.squashfs into a separate 10-usr.squashfs, leaving a rootfs skeleton that live-boot (1:20230131+deb12u1) cannot mount: the initramfs panics with "Can not mount /dev/loop0 ... filesystem.squashfs". live-boot in bookworm expects a single self-contained filesystem.squashfs. Revert to the standard single-squashfs layout and remove the dead multi-squashfs guard in needs_full_build(). The split_live_squashfs_layers function is kept for future reference. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>