Upstream no longer has an `ig_e2ee` option in either connector. It is
already absent at v0.2607.0, the version both roles are pinned to, so
we have been rendering a dead key into config.yaml for a while.
Anyone who set the variable is told it is gone, via the usual
deprecated-variable check.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>