diff --git a/packages/react-reconciler/src/ReactFiberCommitWork.new.js b/packages/react-reconciler/src/ReactFiberCommitWork.new.js
index 767ee05b39b0c..714c77e477ae9 100644
--- a/packages/react-reconciler/src/ReactFiberCommitWork.new.js
+++ b/packages/react-reconciler/src/ReactFiberCommitWork.new.js
@@ -136,8 +136,6 @@ import {
   captureCommitPhaseError,
   resolveRetryWakeable,
   markCommitTimeOfFallback,
-  enqueuePendingPassiveHookEffectMount,
-  enqueuePendingPassiveHookEffectUnmount,
   enqueuePendingPassiveProfilerEffect,
 } from './ReactFiberWorkLoop.new';
 import {
@@ -533,26 +531,6 @@ function commitHookEffectListMount(tag: number, finishedWork: Fiber) {
   }
 }
 
-function schedulePassiveEffects(finishedWork: Fiber) {
-  const updateQueue: FunctionComponentUpdateQueue | null = (finishedWork.updateQueue: any);
-  const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;
-  if (lastEffect !== null) {
-    const firstEffect = lastEffect.next;
-    let effect = firstEffect;
-    do {
-      const {next, tag} = effect;
-      if (
-        (tag & HookPassive) !== NoHookEffect &&
-        (tag & HookHasEffect) !== NoHookEffect
-      ) {
-        enqueuePendingPassiveHookEffectUnmount(finishedWork, effect);
-        enqueuePendingPassiveHookEffectMount(finishedWork, effect);
-      }
-      effect = next;
-    } while (effect !== firstEffect);
-  }
-}
-
 export function commitPassiveEffectDurations(
   finishedRoot: FiberRoot,
   finishedWork: Fiber,
@@ -639,8 +617,6 @@ function commitLayoutEffectOnFiber(
         } else {
           commitHookEffectListMount(HookLayout | HookHasEffect, finishedWork);
         }
-
-        schedulePassiveEffects(finishedWork);
         break;
       }
       case ClassComponent: {
@@ -1091,9 +1067,7 @@ function commitUnmount(
           do {
             const {destroy, tag} = effect;
             if (destroy !== undefined) {
-              if ((tag & HookPassive) !== NoHookEffect) {
-                enqueuePendingPassiveHookEffectUnmount(current, effect);
-              } else {
+              if ((tag & HookLayout) !== NoHookEffect) {
                 if (
                   enableProfilerTimer &&
                   enableProfilerCommitHooks &&
diff --git a/packages/react-reconciler/src/ReactFiberFlags.js b/packages/react-reconciler/src/ReactFiberFlags.js
index f6778178d7544..f29a1b645f15a 100644
--- a/packages/react-reconciler/src/ReactFiberFlags.js
+++ b/packages/react-reconciler/src/ReactFiberFlags.js
@@ -81,6 +81,8 @@ export const MutationMask =
   Hydrating |
   Visibility;
 export const LayoutMask = Update | Callback | Ref;
+
+// TODO: Split into PassiveMountMask and PassiveUnmountMask
 export const PassiveMask = Passive | ChildDeletion;
 
 // Union of tags that don't get reset on clones.
diff --git a/packages/react-reconciler/src/ReactFiberHooks.new.js b/packages/react-reconciler/src/ReactFiberHooks.new.js
index d5ad5048926ea..e21d10b9d706d 100644
--- a/packages/react-reconciler/src/ReactFiberHooks.new.js
+++ b/packages/react-reconciler/src/ReactFiberHooks.new.js
@@ -472,6 +472,8 @@ export function bailoutHooks(
   lanes: Lanes,
 ) {
   workInProgress.updateQueue = current.updateQueue;
+  // TODO: Don't need to reset the flags here, because they're reset in the
+  // complete phase (bubbleProperties).
   workInProgress.flags &= ~(PassiveEffect | UpdateEffect);
   current.lanes = removeLanes(current.lanes, lanes);
 }
@@ -1309,7 +1311,7 @@ function mountEffect(
     }
   }
   return mountEffectImpl(
-    UpdateEffect | PassiveEffect | PassiveStaticEffect,
+    PassiveEffect | PassiveStaticEffect,
     HookPassive,
     create,
     deps,
@@ -1326,12 +1328,7 @@ function updateEffect(
       warnIfNotCurrentlyActingEffectsInDEV(currentlyRenderingFiber);
     }
   }
-  return updateEffectImpl(
-    UpdateEffect | PassiveEffect,
-    HookPassive,
-    create,
-    deps,
-  );
+  return updateEffectImpl(PassiveEffect, HookPassive, create, deps);
 }
 
 function mountLayoutEffect(
@@ -1683,7 +1680,7 @@ function mountOpaqueIdentifier(): OpaqueIDType | void {
     const setId = mountState(id)[1];
 
     if ((currentlyRenderingFiber.mode & BlockingMode) === NoMode) {
-      currentlyRenderingFiber.flags |= UpdateEffect | PassiveEffect;
+      currentlyRenderingFiber.flags |= PassiveEffect;
       pushEffect(
         HookHasEffect | HookPassive,
         () => {
diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
index e51542c9444d3..ed3c4ce8882c3 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
@@ -13,7 +13,6 @@ import type {Lanes, Lane} from './ReactFiberLane.new';
 import type {ReactPriorityLevel} from './ReactInternalTypes';
 import type {Interaction} from 'scheduler/src/Tracing';
 import type {SuspenseState} from './ReactFiberSuspenseComponent.new';
-import type {Effect as HookEffect} from './ReactFiberHooks.new';
 import type {StackCursor} from './ReactFiberStack.new';
 import type {FunctionComponentUpdateQueue} from './ReactFiberHooks.new';
 
@@ -120,12 +119,11 @@ import {
   NoFlags,
   PerformedWork,
   Placement,
-  ChildDeletion,
-  Passive,
   PassiveStatic,
   Incomplete,
   HostEffectMask,
   Hydrating,
+  PassiveMask,
   StaticMask,
 } from './ReactFiberFlags';
 import {
@@ -183,7 +181,6 @@ import {
   commitPassiveEffectDurations,
   commitPassiveMountEffects,
   commitPassiveUnmountEffects,
-  detachFiberAfterEffects,
 } from './ReactFiberCommitWork.new';
 import {enqueueUpdate} from './ReactUpdateQueue.new';
 import {resetContextDependencies} from './ReactFiberNewContext.new';
@@ -314,7 +311,6 @@ export function getRenderTargetTime(): number {
   return workInProgressRootRenderTargetTime;
 }
 
-let nextEffect: Fiber | null = null;
 let hasUncaughtError = false;
 let firstUncaughtError = null;
 let legacyErrorBoundariesThatAlreadyFailed: Set<mixed> | null = null;
@@ -1938,8 +1934,8 @@ function commitRootImpl(root, renderPriorityLevel) {
   // TODO: Delete all other places that schedule the passive effect callback
   // They're redundant.
   if (
-    (finishedWork.subtreeFlags & Passive) !== NoFlags ||
-    (finishedWork.flags & Passive) !== NoFlags
+    (finishedWork.subtreeFlags & PassiveMask) !== NoFlags ||
+    (finishedWork.flags & PassiveMask) !== NoFlags
   ) {
     if (!rootDoesHavePassiveEffects) {
       rootDoesHavePassiveEffects = true;
@@ -2061,31 +2057,6 @@ function commitRootImpl(root, renderPriorityLevel) {
     rootWithPendingPassiveEffects = root;
     pendingPassiveEffectsLanes = lanes;
     pendingPassiveEffectsRenderPriority = renderPriorityLevel;
-  } else {
-    // We are done with the effect chain at this point so let's clear the
-    // nextEffect pointers to assist with GC. If we have passive effects, we'll
-    // clear this in flushPassiveEffects
-    // TODO: We should always do this in the passive phase, by scheduling
-    // a passive callback for every deletion.
-    nextEffect = firstEffect;
-    while (nextEffect !== null) {
-      const nextNextEffect = nextEffect.nextEffect;
-      nextEffect.nextEffect = null;
-      if (nextEffect.flags & ChildDeletion) {
-        const deletions = nextEffect.deletions;
-        if (deletions !== null) {
-          for (let i = 0; i < deletions.length; i++) {
-            const deletion = deletions[i];
-            const alternate = deletion.alternate;
-            detachFiberAfterEffects(deletion);
-            if (alternate !== null) {
-              detachFiberAfterEffects(alternate);
-            }
-          }
-        }
-      }
-      nextEffect = nextNextEffect;
-    }
   }
 
   // Read this again, since an effect might have updated it
@@ -2229,32 +2200,6 @@ export function enqueuePendingPassiveProfilerEffect(fiber: Fiber): void {
   }
 }
 
-export function enqueuePendingPassiveHookEffectMount(
-  fiber: Fiber,
-  effect: HookEffect,
-): void {
-  if (!rootDoesHavePassiveEffects) {
-    rootDoesHavePassiveEffects = true;
-    scheduleCallback(NormalSchedulerPriority, () => {
-      flushPassiveEffects();
-      return null;
-    });
-  }
-}
-
-export function enqueuePendingPassiveHookEffectUnmount(
-  fiber: Fiber,
-  effect: HookEffect,
-): void {
-  if (!rootDoesHavePassiveEffects) {
-    rootDoesHavePassiveEffects = true;
-    scheduleCallback(NormalSchedulerPriority, () => {
-      flushPassiveEffects();
-      return null;
-    });
-  }
-}
-
 function flushPassiveEffectsImpl() {
   if (rootWithPendingPassiveEffects === null) {
     return false;