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
return null;
      }
      
      
      nextScheduledRoot = next;
    }
    let root = nextScheduledRoot;
    let highestPriorityRoot = null;
    let highestPriorityLevel = NoWork;
    while (root !== null) {
      if (
        root.current.pendingWorkPriority !== NoWork &&
        (highestPriorityLevel === NoWork ||
          highestPriorityLevel > root.current.pendingWorkPriority)
      ) {
        highestPriorityLevel = root.current.pendingWorkPriority;
        highestPriorityRoot = root;
      }
       We didn't find anything to do in this root, so let's try the next one.
      root = root.nextScheduledRoot;
    }
    if (highestPriorityRoot !== null) {
      nextPriorityLevel = highestPriorityLevel;
      
      
      
      
      
      resetContextStack();
      nextUnitOfWork = createWorkInProgress(