netboot_firmware_settings: drop unused script

It's been moved to the chromeos-bootimage package directly.

BUG=None
TEST=CQ passes

Cq-Depend: chromium:2720468
Change-Id: I3af92a4d28d23c1b43a50867a6450be1f0c04af8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2720452
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Sergey Frolov <sfrolov@google.com>
3 files changed