Initramfs images are not supported by imagebuilder. With recent changes
to support Per Device Rootfs, we now generate an image and a vmlinux for
each Rootfs and these additional files are all shipped in the
imagebuilder tar.
Drop these new file and any vmlinux-initramfs as they are not used and
increase the final size of the imagebuilder archive.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
c85348d9ab