Revert "artifacts: temporarily re-add BundleArtifacts"

This reverts commit b05147b2a44b7021edcc79702252054231aa501c.

Reason for revert: This was only needed for the migration.  No actual calls of this endpoint exist outside of the recipes tests.

Original change's description:
> artifacts: temporarily re-add BundleArtifacts
>
> We need this to remain for a little bit to allow the proto roll to
> happen while we switch to Get.
>
> TBR=saklein
> BUG=chromium:1034529
> TEST=generate
>
> Change-Id: I79af015644017e8f37b7536c2b765c54dd1b14ac
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2662113
> Reviewed-by: LaMont Jones <lamontjones@chromium.org>
> Commit-Queue: LaMont Jones <lamontjones@chromium.org>

BUG=chromium:1034529
TEST=generate

Change-Id: Ic4f17d24fe5d472da5669471002ac015a1965c8f
Cq-Depend: chromium:2659583
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2662235
Reviewed-by: Michael Mortensen <mmortensen@google.com>
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
2 files changed