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
startCommitTimer();
    }
    pendingCommit = null;
    const root: FiberRoot = (finishedWork.stateNode: any);
    invariant(
      root.current !== finishedWork,
      'Cannot commit the same tree as before. This is probably a bug ' +
        'related to the return field. This error is likely caused by a bug ' +
        'in React. Please file an issue.',
    );
    if (
      nextPriorityLevel === SynchronousPriority ||
      nextPriorityLevel === TaskPriority
    ) {
      
      
      nestedUpdateCount++;
    }
     Reset this to null before calling lifecycles
    ReactCurrentOwner.current = null;
    let firstEffect;
    if (finishedWork.effectTag > PerformedWork) {
      
      
      
      
      if (finishedWork.lastEffect !== null) {
        finishedWork.lastEffect.nextEffect = finishedWork;
        firstEffect = finishedWork.firstEffect;
      } else {