cleanup enableProfilerNestedUpdateScheduledHook feature flag (#28509)

## Summary

Looks like this was added years ago for instrumentation at meta that
never ended up rolling out. Should be safe to clean up.

## How did you test this change?
`yarn test`

DiffTrain build for [0d1ae5d](0d1ae5d)

Author: noahlemen

compiled/facebook-www/REVISION

@@ -1 +1 @@
-64f354cf27a17c4e5b0dfcd908e47940cf947771
+0d1ae5d753044fae99bc37a7815aa947447de3f8

compiled/facebook-www/React-prod.classic.js

@@ -633,4 +633,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactCurrentDispatcher.current.useTransition();
 };
-exports.version = "18.3.0-www-classic-8c94b449";
+exports.version = "18.3.0-www-classic-0d16943c";

compiled/facebook-www/ReactART-dev.classic.js

@@ -66,7 +66,7 @@ if (__DEV__) {
       return self;
     }
 
-    var ReactVersion = "18.3.0-www-classic-81c495cd";
+    var ReactVersion = "18.3.0-www-classic-db11990b";
 
     var LegacyRoot = 0;
     var ConcurrentRoot = 1;
@@ -194,8 +194,6 @@ if (__DEV__) {
     var enableProfilerTimer = true;
     var enableProfilerCommitHooks = true;
     var enableProfilerNestedUpdatePhase = true;
-    var enableProfilerNestedUpdateScheduledHook =
-      dynamicFeatureFlags.enableProfilerNestedUpdateScheduledHook;
     var enableAsyncActions = true; // Logs additional User Timing API marks for use with an experimental profiling tool.
 
     var enableSchedulingProfiler = dynamicFeatureFlags.enableSchedulingProfiler;
@@ -25344,10 +25342,7 @@ if (__DEV__) {
     }
     var hasUncaughtError = false;
     var firstUncaughtError = null;
-    var legacyErrorBoundariesThatAlreadyFailed = null; // Only used when enableProfilerNestedUpdateScheduledHook is true;
-    // to track which root is currently committing layout effects.
-
-    var rootCommittingMutationOrLayoutEffects = null;
+    var legacyErrorBoundariesThatAlreadyFailed = null;
     var rootDoesHavePassiveEffects = false;
     var rootWithPendingPassiveEffects = null;
     var pendingPassiveEffectsLanes = NoLanes;
@@ -25543,32 +25538,6 @@ if (__DEV__) {
 
         warnIfUpdatesNotWrappedWithActDEV(fiber);
 
-        if (enableProfilerNestedUpdateScheduledHook) {
-          if (
-            (executionContext & CommitContext) !== NoContext &&
-            root === rootCommittingMutationOrLayoutEffects
-          ) {
-            if (fiber.mode & ProfileMode) {
-              var current = fiber;
-
-              while (current !== null) {
-                if (current.tag === Profiler) {
-                  var _current$memoizedProp = current.memoizedProps,
-                    id = _current$memoizedProp.id,
-                    onNestedUpdateScheduled =
-                      _current$memoizedProp.onNestedUpdateScheduled;
-
-                  if (typeof onNestedUpdateScheduled === "function") {
-                    onNestedUpdateScheduled(id);
-                  }
-                }
-
-                current = current.return;
-              }
-            }
-          }
-        }
-
         if (enableTransitionTracing) {
           var transition = ReactCurrentBatchConfig.transition;
 
@@ -27548,12 +27517,6 @@ if (__DEV__) {
           // Mark the current commit time to be shared by all Profilers in this
           // batch. This enables them to be grouped later.
           recordCommitTime();
-        }
-
-        if (enableProfilerNestedUpdateScheduledHook) {
-          // Track the root here, rather than in commitLayoutEffects(), because of ref setters.
-          // Updates scheduled during ref detachment should also be flagged.
-          rootCommittingMutationOrLayoutEffects = root;
         } // The next phase is the mutation phase, where we mutate the host tree.
 
         commitMutationEffects(root, finishedWork, lanes);
@@ -27585,10 +27548,6 @@ if (__DEV__) {
 
         if (enableSchedulingProfiler) {
           markLayoutEffectsStopped();
-        }
-
-        if (enableProfilerNestedUpdateScheduledHook) {
-          rootCommittingMutationOrLayoutEffects = null;
         } // Tell Scheduler to yield at the end of the frame, so the browser has an
         // opportunity to paint.
 

compiled/facebook-www/ReactART-dev.modern.js

@@ -66,7 +66,7 @@ if (__DEV__) {
       return self;
     }
 
-    var ReactVersion = "18.3.0-www-modern-c4d09ac8";
+    var ReactVersion = "18.3.0-www-modern-d1dd2d63";
 
     var LegacyRoot = 0;
     var ConcurrentRoot = 1;
@@ -194,8 +194,6 @@ if (__DEV__) {
     var enableProfilerTimer = true;
     var enableProfilerCommitHooks = true;
     var enableProfilerNestedUpdatePhase = true;
-    var enableProfilerNestedUpdateScheduledHook =
-      dynamicFeatureFlags.enableProfilerNestedUpdateScheduledHook;
     var enableAsyncActions = true; // Logs additional User Timing API marks for use with an experimental profiling tool.
 
     var enableSchedulingProfiler = dynamicFeatureFlags.enableSchedulingProfiler;
@@ -25003,10 +25001,7 @@ if (__DEV__) {
     }
     var hasUncaughtError = false;
     var firstUncaughtError = null;
-    var legacyErrorBoundariesThatAlreadyFailed = null; // Only used when enableProfilerNestedUpdateScheduledHook is true;
-    // to track which root is currently committing layout effects.
-
-    var rootCommittingMutationOrLayoutEffects = null;
+    var legacyErrorBoundariesThatAlreadyFailed = null;
     var rootDoesHavePassiveEffects = false;
     var rootWithPendingPassiveEffects = null;
     var pendingPassiveEffectsLanes = NoLanes;
@@ -25202,32 +25197,6 @@ if (__DEV__) {
 
         warnIfUpdatesNotWrappedWithActDEV(fiber);
 
-        if (enableProfilerNestedUpdateScheduledHook) {
-          if (
-            (executionContext & CommitContext) !== NoContext &&
-            root === rootCommittingMutationOrLayoutEffects
-          ) {
-            if (fiber.mode & ProfileMode) {
-              var current = fiber;
-
-              while (current !== null) {
-                if (current.tag === Profiler) {
-                  var _current$memoizedProp = current.memoizedProps,
-                    id = _current$memoizedProp.id,
-                    onNestedUpdateScheduled =
-                      _current$memoizedProp.onNestedUpdateScheduled;
-
-                  if (typeof onNestedUpdateScheduled === "function") {
-                    onNestedUpdateScheduled(id);
-                  }
-                }
-
-                current = current.return;
-              }
-            }
-          }
-        }
-
         if (enableTransitionTracing) {
           var transition = ReactCurrentBatchConfig.transition;
 
@@ -27198,12 +27167,6 @@ if (__DEV__) {
           // Mark the current commit time to be shared by all Profilers in this
           // batch. This enables them to be grouped later.
           recordCommitTime();
-        }
-
-        if (enableProfilerNestedUpdateScheduledHook) {
-          // Track the root here, rather than in commitLayoutEffects(), because of ref setters.
-          // Updates scheduled during ref detachment should also be flagged.
-          rootCommittingMutationOrLayoutEffects = root;
         } // The next phase is the mutation phase, where we mutate the host tree.
 
         commitMutationEffects(root, finishedWork, lanes);
@@ -27235,10 +27198,6 @@ if (__DEV__) {
 
         if (enableSchedulingProfiler) {
           markLayoutEffectsStopped();
-        }
-
-        if (enableProfilerNestedUpdateScheduledHook) {
-          rootCommittingMutationOrLayoutEffects = null;
         } // Tell Scheduler to yield at the end of the frame, so the browser has an
         // opportunity to paint.
 

compiled/facebook-www/ReactDOM-dev.classic.js

@@ -160,8 +160,6 @@ if (__DEV__) {
     var enableProfilerTimer = true;
     var enableProfilerCommitHooks = true;
     var enableProfilerNestedUpdatePhase = true;
-    var enableProfilerNestedUpdateScheduledHook =
-      dynamicFeatureFlags.enableProfilerNestedUpdateScheduledHook;
     var enableFormActions = true;
     var enableAsyncActions = true; // Logs additional User Timing API marks for use with an experimental profiling tool.
 
@@ -31163,10 +31161,7 @@ if (__DEV__) {
     }
     var hasUncaughtError = false;
     var firstUncaughtError = null;
-    var legacyErrorBoundariesThatAlreadyFailed = null; // Only used when enableProfilerNestedUpdateScheduledHook is true;
-    // to track which root is currently committing layout effects.
-
-    var rootCommittingMutationOrLayoutEffects = null;
+    var legacyErrorBoundariesThatAlreadyFailed = null;
     var rootDoesHavePassiveEffects = false;
     var rootWithPendingPassiveEffects = null;
     var pendingPassiveEffectsLanes = NoLanes;
@@ -31362,32 +31357,6 @@ if (__DEV__) {
 
         warnIfUpdatesNotWrappedWithActDEV(fiber);
 
-        if (enableProfilerNestedUpdateScheduledHook) {
-          if (
-            (executionContext & CommitContext) !== NoContext &&
-            root === rootCommittingMutationOrLayoutEffects
-          ) {
-            if (fiber.mode & ProfileMode) {
-              var current = fiber;
-
-              while (current !== null) {
-                if (current.tag === Profiler) {
-                  var _current$memoizedProp = current.memoizedProps,
-                    id = _current$memoizedProp.id,
-                    onNestedUpdateScheduled =
-                      _current$memoizedProp.onNestedUpdateScheduled;
-
-                  if (typeof onNestedUpdateScheduled === "function") {
-                    onNestedUpdateScheduled(id);
-                  }
-                }
-
-                current = current.return;
-              }
-            }
-          }
-        }
-
         if (enableTransitionTracing) {
           var transition = ReactCurrentBatchConfig$1.transition;
 
@@ -33429,12 +33398,6 @@ if (__DEV__) {
           // Mark the current commit time to be shared by all Profilers in this
           // batch. This enables them to be grouped later.
           recordCommitTime();
-        }
-
-        if (enableProfilerNestedUpdateScheduledHook) {
-          // Track the root here, rather than in commitLayoutEffects(), because of ref setters.
-          // Updates scheduled during ref detachment should also be flagged.
-          rootCommittingMutationOrLayoutEffects = root;
         } // The next phase is the mutation phase, where we mutate the host tree.
 
         commitMutationEffects(root, finishedWork, lanes);
@@ -33474,10 +33437,6 @@ if (__DEV__) {
 
         if (enableSchedulingProfiler) {
           markLayoutEffectsStopped();
-        }
-
-        if (enableProfilerNestedUpdateScheduledHook) {
-          rootCommittingMutationOrLayoutEffects = null;
         } // Tell Scheduler to yield at the end of the frame, so the browser has an
         // opportunity to paint.
 
@@ -36034,7 +35993,7 @@ if (__DEV__) {
       return root;
     }
 
-    var ReactVersion = "18.3.0-www-classic-3e5b27d2";
+    var ReactVersion = "18.3.0-www-classic-26a9fc54";
 
     function createPortal$1(
       children,

compiled/facebook-www/ReactDOM-dev.modern.js

@@ -155,8 +155,6 @@ if (__DEV__) {
     var enableProfilerTimer = true;
     var enableProfilerCommitHooks = true;
     var enableProfilerNestedUpdatePhase = true;
-    var enableProfilerNestedUpdateScheduledHook =
-      dynamicFeatureFlags.enableProfilerNestedUpdateScheduledHook;
     var enableFormActions = true;
     var enableAsyncActions = true; // Logs additional User Timing API marks for use with an experimental profiling tool.
 
@@ -31019,10 +31017,7 @@ if (__DEV__) {
     }
     var hasUncaughtError = false;
     var firstUncaughtError = null;
-    var legacyErrorBoundariesThatAlreadyFailed = null; // Only used when enableProfilerNestedUpdateScheduledHook is true;
-    // to track which root is currently committing layout effects.
-
-    var rootCommittingMutationOrLayoutEffects = null;
+    var legacyErrorBoundariesThatAlreadyFailed = null;
     var rootDoesHavePassiveEffects = false;
     var rootWithPendingPassiveEffects = null;
     var pendingPassiveEffectsLanes = NoLanes;
@@ -31218,32 +31213,6 @@ if (__DEV__) {
 
         warnIfUpdatesNotWrappedWithActDEV(fiber);
 
-        if (enableProfilerNestedUpdateScheduledHook) {
-          if (
-            (executionContext & CommitContext) !== NoContext &&
-            root === rootCommittingMutationOrLayoutEffects
-          ) {
-            if (fiber.mode & ProfileMode) {
-              var current = fiber;
-
-              while (current !== null) {
-                if (current.tag === Profiler) {
-                  var _current$memoizedProp = current.memoizedProps,
-                    id = _current$memoizedProp.id,
-                    onNestedUpdateScheduled =
-                      _current$memoizedProp.onNestedUpdateScheduled;
-
-                  if (typeof onNestedUpdateScheduled === "function") {
-                    onNestedUpdateScheduled(id);
-                  }
-                }
-
-                current = current.return;
-              }
-            }
-          }
-        }
-
         if (enableTransitionTracing) {
           var transition = ReactCurrentBatchConfig$1.transition;
 
@@ -33276,12 +33245,6 @@ if (__DEV__) {
           // Mark the current commit time to be shared by all Profilers in this
           // batch. This enables them to be grouped later.
           recordCommitTime();
-        }
-
-        if (enableProfilerNestedUpdateScheduledHook) {
-          // Track the root here, rather than in commitLayoutEffects(), because of ref setters.
-          // Updates scheduled during ref detachment should also be flagged.
-          rootCommittingMutationOrLayoutEffects = root;
         } // The next phase is the mutation phase, where we mutate the host tree.
 
         commitMutationEffects(root, finishedWork, lanes);
@@ -33321,10 +33284,6 @@ if (__DEV__) {
 
         if (enableSchedulingProfiler) {
           markLayoutEffectsStopped();
-        }
-
-        if (enableProfilerNestedUpdateScheduledHook) {
-          rootCommittingMutationOrLayoutEffects = null;
         } // Tell Scheduler to yield at the end of the frame, so the browser has an
         // opportunity to paint.
 
@@ -35881,7 +35840,7 @@ if (__DEV__) {
       return root;
     }
 
-    var ReactVersion = "18.3.0-www-modern-b7723bc0";
+    var ReactVersion = "18.3.0-www-modern-9c67d6cd";
 
     function createPortal$1(
       children,