build_image: drop old --toolset option
This was added in the days when we had a `brillo` command. We've
purged that tool and related work, so drop this flag too as no one
else passes it down.
BUG=chromium:934975
TEST=precq passes
Change-Id: Ie7d3adfa24a871c3c6fa8eda6506d55315421e58
Reviewed-on: https://chromium-review.googlesource.com/1490618
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Alex Klein <saklein@chromium.org>
1 file changed
