futility: Remove --devsign and --devkeyblock

This feature has not been needed since pre-2012 devices which have long
since reached their end of life. We can safely remove it to simplify the
Also remove ZGB image, as it is no longer needed.

TEST=sudo FEATURES=test emerge vboot_reference

Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Cq-Depend: chromium:3650757
Change-Id: I889dc6300c5cb72bdfcb9c2b66d63e97d3f8c862
Disallow-Recycled-Builds: test-failures
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3578968
Commit-Queue: Jakub Czapiga <czapiga@google.com>
Auto-Submit: Jakub Czapiga <czapiga@google.com>
Tested-by: Jakub Czapiga <czapiga@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
17 files changed