The VectorChord migration that rolled out last year is now complete. The next release performs the final cleanup step: dropping the empty vectors schema that pgvecto.rs left behind (#327).
The pgvecto.rs extension itself is already gone. Immich dropped it from the database automatically after the migration, and the package stopped shipping it with era 2 (v2.5.6). The only trace left on systems that lived through the migration is an empty vectors schema in the database.
Starting with the next release, this schema is removed automatically when the database service starts. The cleanup is safe: it only removes the schema if it exists, and it refuses to touch a schema that unexpectedly contains data. Fresh installs never had the schema and are unaffected. No action is needed on your part.