Remove unused import

That's why you wait for the lint job to finish, Andrew!!!!!!

Author: acdlite

packages/react-reconciler/src/ReactFiberClassComponent.js

@@ -53,7 +53,6 @@ import {
   requestCurrentTime,
   computeExpirationForFiber,
   scheduleWork,
-  flushPassiveEffects,
 } from './ReactFiberWorkLoop';
 import {requestCurrentSuspenseConfig} from './ReactFiberSuspenseConfig';
 

packages/react-reconciler/src/ReactFiberHooks.js

@@ -38,7 +38,6 @@ import {
 import {
   scheduleWork,
   computeExpirationForFiber,
-  flushPassiveEffects,
   requestCurrentTime,
   warnIfNotCurrentlyActingEffectsInDEV,
   warnIfNotCurrentlyActingUpdatesInDev,