removed unnecessary find_changeset_by_index

Author: DGollings

lib/ash/actions/update/bulk.ex

@@ -3538,17 +3538,13 @@ defmodule Ash.Actions.Update.Bulk do
     end
   end
 
-  defp find_changeset_by_index(result, changesets_by_ref, metadata_key) do
-    changesets_by_ref[result.__metadata__[metadata_key]]
-  end
-
   defp find_changeset(result, changesets_by_ref, _metadata_key, ref_metadata_key)
        when not is_nil(ref_metadata_key) do
     find_changeset_by_ref(result, changesets_by_ref, ref_metadata_key)
   end
 
   defp find_changeset(result, changesets_by_ref, metadata_key, nil) do
-    find_changeset_by_index(result, changesets_by_ref, metadata_key)
+    find_changeset_by_ref(result, changesets_by_ref, metadata_key)
   end
 
   defp add_metadata_to_results({:ok, results}, batch, metadata_key, ref_metadata_key, context_key) do