code: function deleteLegacyState(trackedItem, context) {
    const taskTrackingName = Settings.getLegacyTaskTrackingName(context);
    return taskTrackingName && trackedItem ? delete trackedItem[taskTrackingName] : true;
  }
docs: Deletes any legacy task tracking state attached directly to the tracked item from previous runs of older versions of
  aws-stream-consumer.
  @param {TrackedItem} trackedItem - the tracked item from which to remove its legacy tracked state
  @param {StreamConsumerContext} context - the context to use to resolve the name of the legacy task tracking state property
  @return {boolean} whether the task tracking state property was deleted or not