Remove remaining HTML elements

sky/engine/core/html/HTMLTitleElement.h

-/*
- * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
- *           (C) 1999 Antti Koivisto (koivisto@kde.org)
- * Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-#ifndef SKY_ENGINE_CORE_HTML_HTMLTITLEELEMENT_H_
-#define SKY_ENGINE_CORE_HTML_HTMLTITLEELEMENT_H_
-
-#include "sky/engine/core/html/HTMLElement.h"
-
-namespace blink {
-
-class HTMLTitleElement final : public HTMLElement {
-    DEFINE_WRAPPERTYPEINFO();
-public:
-    DECLARE_NODE_FACTORY(HTMLTitleElement);
-
-    String text() const;
-    void setText(const String&);
-
-private:
-    explicit HTMLTitleElement(Document&);
-
-    virtual void insertedInto(ContainerNode*) override;
-    virtual void removedFrom(ContainerNode*) override;
-    virtual void childrenChanged(const ChildrenChange&) override;
-
-    bool m_ignoreTitleUpdatesWhenChildrenChange;
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_HTML_HTMLTITLEELEMENT_H_