remove blobutil and boards/utils needing/for blobs

delete all blobs. TODO: actually deblob coreboot/uboot
when downloading. i'll that in a little while, in an
upcoming commit.

yes.

purge it all, in fsf style. censor what the fsf doesn't like.

so that they can feel good about having less, because
ideological purity is better than helping more people
use coreboot, yes?

Signed-off-by: Leah Rowe <leah@libreboot.org>