Remove the concept of document.documentElement

sky/engine/core/rendering/RenderView.h

Index: sky/engine/core/rendering/RenderView.h
diff --git a/sky/engine/core/rendering/RenderView.h b/sky/engine/core/rendering/RenderView.h
index f3f40bf034e81e2e3b866858129d205bb1ce7a68..463eaac783f58b3abd79b134db0756eac9175311 100644
--- a/sky/engine/core/rendering/RenderView.h
+++ b/sky/engine/core/rendering/RenderView.h
@@ -84,16 +84,11 @@ public:
 
     LayoutState* layoutState() const { return m_layoutState; }
 
-    virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&) override;
-
     IntRect unscaledDocumentRect() const;
     LayoutRect backgroundRect(RenderBox* backgroundRenderer) const;
 
     IntRect documentRect() const;
 
-    // Renderer that paints the root background has background-images which all have background-attachment: fixed.
-    bool rootBackgroundIsEntirelyFixed() const;
-
     double layoutViewportWidth() const;
     double layoutViewportHeight() const;
 
@@ -117,8 +112,6 @@ private:
     void positionDialog(RenderBox*);
     void positionDialogs();
 
-    RenderObject* backgroundRenderer() const;
-
     FrameView* m_frameView;
 
     RawPtr<RenderObject> m_selectionStart;