function enqueueRemove(parentID, fromIndex) {
  // NOTE: Null values reduce hidden classes.
  updateQueue.push({
    parentID: parentID,
    parentNode: null,
    type: ReactMultiChildUpdateTypes.REMOVE_NODE,
    markupIndex: null,
    textContent: null,
    fromIndex: fromIndex,
    toIndex: null
  });
}
Replaces any rendered children with a text content string.

@param {string} nextContent String of content.
@internal