from Robert Ma:

I am the maintainer of WPT sync (importer/exporter). The bots have been fully migrated to LUCI and are using a new service account. Please revoke the following membership/permissions of the old bot account:
  blink-w3c-test-autoroller@chromium.org
  Chromium committer
  chromium-robot-submitters Gerrit group
  Try bot access (cria/project-chromium-tryjob-access)

However, please do NOT delete this chromium.org account or Gerrit account.

Thank you!