Revert "[autotest] Send labels to shards preserving their ids."

This reverts commit 744898f7e2fe4a3d90659d2183119b0d1fddcb28.

Change-Id: I8c8611b1b3095223e527fb465c2030e743ab6152
Reviewed-on: https://chromium-review.googlesource.com/246274
Reviewed-by: Mungyung Ryu <mkryu@google.com>
Commit-Queue: Mungyung Ryu <mkryu@google.com>
Tested-by: Mungyung Ryu <mkryu@google.com>
3 files changed