message: remove unnecessary error check and more concise doc aggregation
diff: @@ -152,13 +152,13 @@ class BranchUpdate {
  body: esBody
  });
  - let docs = result.hits.hits;
  - if (docs.length === size) {
  - throw new Error("Bug in hub:indexers: need to process larger invalidation sets");
  - }
  + let docs = result.hits.hits.map(hit => {
  + let { id, type } = hit._source.cardstack_pristine.data;
  + return { id, type };
  + });
  accumulatedDocs = accumulatedDocs.concat(docs);
  }
  - return accumulatedDocs.map(doc => doc._source.cardstack_pristine.data);
  + return accumulatedDocs;
  }
  // This method does not need to recursively invalidate, because each
  