message: EventIndex: Use a const instead of a let binding.
diff: @@ -493,7 +493,7 @@ export default class EventIndex extends EventEmitter {
  try {
  for (var i = 0; i < redactionEvents.length; i++) {
  - let ev = redactionEvents[i];
  + const ev = redactionEvents[i];
  await indexManager.deleteEvent(ev.getAssociatedId());
  }
  