host: stop installing unused image signing scripts

Nobody uses these, and we don't want people to use them, so stop
installing them in the SDK to avoid confusion and misuse.

BRANCH=None
BUG=None
TEST=CQ passes

Change-Id: I0b50ecf586cfc59c101c8fc67201052b9389ceb7
Signed-off-by: Mike Frysinger <vapier@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/5497928
Reviewed-by: Julius Werner <jwerner@chromium.org>
1 file changed