cbuildbot_config: update jecht group for R41

Remove 'tidus' from the 'jecht' release group so it can be used for R41
builds, which specifically want 'guado' and 'jecht'.

  - Unit tests pass.
  - Config looks reasonable.

Change-Id: I7325a6c41043d3f526bbe0d74e32eed06e4c00be
Reviewed-on: https://chromium-review.googlesource.com/242298
Reviewed-by: Dharani Govindan <dharani@chromium.org>
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Tested-by: Daniel Jacques <dnj@chromium.org>
Commit-Queue: Daniel Jacques <dnj@chromium.org>
Trybot-Ready: Daniel Jacques <dnj@chromium.org>
2 files changed