Remove RenderLayerScrollableArea

sky/engine/core/rendering/RenderBlock.h

Index: sky/engine/core/rendering/RenderBlock.h
diff --git a/sky/engine/core/rendering/RenderBlock.h b/sky/engine/core/rendering/RenderBlock.h
index 083c865ffc87e9b227243e2613e71a33fd67b7d7..b777544597d1cd6dc8deb6494f7b0c0f17fce44b 100644
--- a/sky/engine/core/rendering/RenderBlock.h
+++ b/sky/engine/core/rendering/RenderBlock.h
@@ -234,16 +234,6 @@ protected:
 
     virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&) override;
 
-    // Delay update scrollbar until finishDelayUpdateScrollInfo() will be
-    // called. This function is used when a flexbox is laying out its
-    // descendant. If multiple calls are made to startDelayUpdateScrollInfo(),
-    // finishDelayUpdateScrollInfo() will do nothing until finishDelayUpdateScrollInfo()
-    // is called the same number of times.
-    static void startDelayUpdateScrollInfo();
-    static void finishDelayUpdateScrollInfo();
-
-    void updateScrollInfoAfterLayout();
-
     virtual void styleWillChange(StyleDifference, const RenderStyle& newStyle) override;
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;