Get rid of unused global variables in HTMLIdentifier.cpp

Source/core/html/parser/HTMLIdentifier.h

Index: Source/core/html/parser/HTMLIdentifier.h
diff --git a/Source/core/html/parser/HTMLIdentifier.h b/Source/core/html/parser/HTMLIdentifier.h
index 54e1a3a0acdda238187b1d1239b54a835320c533..003401314234ae5f0dfa3c35500594457900f15d 100644
--- a/Source/core/html/parser/HTMLIdentifier.h
+++ b/Source/core/html/parser/HTMLIdentifier.h
@@ -72,7 +72,7 @@ public:
 private:
     static unsigned maxNameLength;
     static StringImpl* findIfKnown(const UChar* characters, unsigned length);
-    static void addNames(const QualifiedName* const* names, unsigned namesCount, unsigned indexOffset);
+    static void addNames(const QualifiedName* const* names, unsigned namesCount);
 
     String m_string;
 };