We don't actually use this anywhere, so let's remove it.

https://github.com/facebook/react/blob/f1d00156df5453bc62bd5668fefdcac4ca67e90e/src/renderers/shared/fiber/ReactFiberScheduler.js#L1504-L1512
}
}
var ReactNoop = {
  getChildren(rootID: string = DEFAULT_ROOT_ID) {
    const container = rootContainers.get(rootID);
    if (container) {
      return container.children;
    } else {
      return null;
    }
  },
  // Shortcut for testing a single root
  render(element: React$Element<any>, callback: ?Function) {
    ReactNoop.renderToRootWithID(element, DEFAULT_ROOT_ID, callback);
  },
  renderToRootWithID(
    element: React$Element<any>,
    rootID: string,
    callback: ?Function,
  ) {
    let root = roots.get(rootID);
    if (!root) {
      const container = {rootID: rootID, children: []};
      rootContainers.set(rootID, container);
      root = NoopRenderer.createContainer(container);
      roots.set(rootID, root);
    }
    NoopRenderer.updateContainer(element, root, null, callback);
  },
  unmountRootWithID(rootID: string) {