Remove some unused methods from Node and ContainerNode.

sky/engine/core/dom/Node.h

Index: sky/engine/core/dom/Node.h
diff --git a/sky/engine/core/dom/Node.h b/sky/engine/core/dom/Node.h
index dc661ec7fca15af704eadf10daa9fecd56267d4b..a6214d2240ab93858e6579b1481567384d5354ff 100644
--- a/sky/engine/core/dom/Node.h
+++ b/sky/engine/core/dom/Node.h
@@ -149,8 +149,6 @@ public:
     virtual NodeType nodeType() const = 0;
     ContainerNode* parentNode() const;
     Element* parentElement() const;
-    ContainerNode* parentElementOrShadowRoot() const;
-    ContainerNode* parentElementOrDocumentFragment() const;
     Node* previousSibling() const { return m_previous; }
     Node* nextSibling() const { return m_next; }
     Node* firstChild() const;
@@ -734,16 +732,6 @@ inline bool Node::shouldCallRecalcStyle(StyleRecalcChange change)
     return change >= Inherit || needsStyleRecalc() || childNeedsStyleRecalc();
 }
 
-inline bool isTreeScopeRoot(const Node* node)
-{
-    return !node || node->isDocumentNode() || node->isShadowRoot();
-}
-
-inline bool isTreeScopeRoot(const Node& node)
-{
-    return node.isDocumentNode() || node.isShadowRoot();
-}
-
 // Allow equality comparisons of Nodes by reference or pointer, interchangeably.
 DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES_REFCOUNTED(Node)