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
/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @providesModule ReactNoopEntry
 * @flow
 */
/**
 * This is a renderer of React that doesn't have a render target output.
 * It is useful to demonstrate the internals of the reconciler in isolation
 * and for testing semantics of reconciliation separate from the host
 * environment.
 */
'use strict';
import type {Fiber} from 'ReactFiber';
import type {UpdateQueue} from 'ReactFiberUpdateQueue';
var ReactFiberInstrumentation = require('ReactFiberInstrumentation');
var ReactFiberReconciler = require('ReactFiberReconciler');
var ReactInstanceMap = require('ReactInstanceMap');
var {TaskPriority} = require('ReactPriorityLevel');
var emptyObject = require('fbjs/lib/emptyObject');