Revert "Make removeClippedSubviews toggle-resilient (#56211)"

This reverts commit 6560d16.

Author: cipolleschi

packages/react-native/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm

@@ -156,19 +156,12 @@ - (void)unmountChildComponentView:(UIView<RCTComponentViewProtocol> *)childCompo
   if (_removeClippedSubviews) {
     [_reactSubviews removeObjectAtIndex:index];
   } else {
-    RCTAssert(
-        childComponentView.superview != nil,
-        @"Attempt to unmount a view which is not mounted. (parent: %@, child: %@, index: %@)",
-        self,
-        childComponentView,
-        @(index));
     RCTAssert(
         childComponentView.superview == self.currentContainerView,
-        @"Attempt to unmount a view which is mounted inside a different view. (parent: %@, child: %@, index: %@, existing parent: %@)",
+        @"Attempt to unmount a view which is mounted inside different view. (parent: %@, child: %@, index: %@)",
         self,
         childComponentView,
-        @(index),
-        @([childComponentView.superview tag]));
+        @(index));
     RCTAssert(
         (self.currentContainerView.subviews.count > index) &&
             [self.currentContainerView.subviews objectAtIndex:index] == childComponentView,
@@ -183,30 +176,6 @@ - (void)unmountChildComponentView:(UIView<RCTComponentViewProtocol> *)childCompo
   [childComponentView removeFromSuperview];
 }
 
-- (void)_updateRemoveClippedSubviewsState
-{
-  if (_removeClippedSubviews) {
-    // Toggled ON: populate _reactSubviews from the current view hierarchy.
-    // Actual clipping will happen on the next scroll event.
-    RCTAssert(
-        _reactSubviews.count == 0,
-        @"_reactSubviews should be empty when toggling removeClippedSubviews on. (view: %@, count: %@)",
-        self,
-        @(_reactSubviews.count));
-    if (self.currentContainerView.subviews.count > 0) {
-      _reactSubviews = [NSMutableArray arrayWithArray:self.currentContainerView.subviews];
-    }
-  } else {
-    // Toggled OFF: re-mount all children in the correct order, then clear the tracking array.
-    // addSubview: on an already-present child moves it to the front, so iterating in order
-    // produces the correct subview ordering.
-    for (UIView *view in _reactSubviews) {
-      [self.currentContainerView addSubview:view];
-    }
-    [_reactSubviews removeAllObjects];
-  }
-}
-
 - (void)updateClippedSubviewsWithClipRect:(CGRect)clipRect relativeToView:(UIView *)clipView
 {
   if (!_removeClippedSubviews) {
@@ -272,7 +241,9 @@ - (void)updateProps:(const Props::Shared &)props oldProps:(const Props::Shared &
   if (!ReactNativeFeatureFlags::enableViewCulling()) {
     if (oldViewProps.removeClippedSubviews != newViewProps.removeClippedSubviews) {
       _removeClippedSubviews = newViewProps.removeClippedSubviews;
-      [self _updateRemoveClippedSubviewsState];
+      if (_removeClippedSubviews && self.currentContainerView.subviews.count > 0) {
+        _reactSubviews = [NSMutableArray arrayWithArray:self.currentContainerView.subviews];
+      }
     }
   }