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
if (current.alternate === null) {
            ReactFiberInstrumentation.debugTool.onMountContainer(container);
          } else if (element === null) {
            ReactFiberInstrumentation.debugTool.onUnmountContainer(container);
          } else {
            ReactFiberInstrumentation.debugTool.onUpdateContainer(container);
          }
        }
      }
      const context = getContextForSubtree(parentComponent);
      if (container.context === null) {
        container.context = context;
      } else {
        container.pendingContext = context;
      }
      scheduleTopLevelUpdate(current, element, callback);
    },
    performWithPriority,
    batchedUpdates,
    unbatchedUpdates,
    deferredUpdates,
    flushSync,
    getPublicRootInstance(