message: we don't query this through the searcher anymore
diff: @@ -217,8 +217,7 @@ class Searcher {
  async _fieldFilter(branch, schema, aboveSegments, key, value) {
  let field;
  - // TODO: verify if we are still using these
  - if (['cardstack_source', 'cardstack_references'].includes(key)) {
  + if (['cardstack_source'].includes(key)) {
  // this is an internal field (meaning it's not visible in the
  // jsonapi records themselves) that we make available for
  // filtering. The schema-cache uses this to avoid shadowing seed
  