Remove NodeIterator.expandEntityReferences / TreeWalker.expandEntityReferences

Source/core/dom/NodeIteratorBase.h

Index: Source/core/dom/NodeIteratorBase.h
diff --git a/Source/core/dom/NodeIteratorBase.h b/Source/core/dom/NodeIteratorBase.h
index a9ce853bfd8d5de6754756fa2be56fdf55318e78..94966fd149ff4781974cb1b4217aff82a4cfaf49 100644
--- a/Source/core/dom/NodeIteratorBase.h
+++ b/Source/core/dom/NodeIteratorBase.h
@@ -40,10 +40,6 @@ public:
     Node* root() const { return m_root.get(); }
     unsigned whatToShow() const { return m_whatToShow; }
     NodeFilter* filter() const { return m_filter.get(); }
-    // |expandEntityReferences| first appeared in "DOM Level 2 Traversal and Range". However, this argument was
-    // never implemented, and, in DOM4, the function argument |expandEntityReferences| is removed from
-    // Document.createNodeIterator() and Document.createTreeWalker().
-    bool expandEntityReferences() const { return false; }
 
     virtual void trace(Visitor*);