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
nextUnitOfWork = performUnitOfWork(nextUnitOfWork);
          if (nextUnitOfWork === null) {
            invariant(
              pendingCommit !== null,
              'Should have a pending commit. This error is likely caused by ' +
                'a bug in React. Please file an issue.',
            );
            
            priorityContext = TaskPriority;
            commitAllWork(pendingCommit);
            priorityContext = nextPriorityLevel;
            
            handleCommitPhaseErrors();
            
            if (
              nextPriorityLevel === NoWork ||
              nextPriorityLevel > minPriorityLevel ||
              nextPriorityLevel > TaskPriority
            ) {
              
              break;
            }
          }
        }
      } else if (deadline !== null) {
        
        while (nextUnitOfWork !== null && !deadlineHasExpired) {
          if (deadline.timeRemaining() > timeHeuristicForUnitOfWork) {
            nextUnitOfWork = performUnitOfWork(nextUnitOfWork);