Remove the document tagged code as it is unused.

core/fpdfdoc/include/fpdf_tagged.h

Index: core/fpdfdoc/include/fpdf_tagged.h
diff --git a/core/fpdfdoc/include/fpdf_tagged.h b/core/fpdfdoc/include/fpdf_tagged.h
deleted file mode 100644
index 43d69e8db92585622961d5d5400a1856714b2314..0000000000000000000000000000000000000000
--- a/core/fpdfdoc/include/fpdf_tagged.h
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef CORE_FPDFDOC_INCLUDE_FPDF_TAGGED_H_
-#define CORE_FPDFDOC_INCLUDE_FPDF_TAGGED_H_
-
-#include "core/fxge/include/fx_dib.h"
-
-class CPDF_Dictionary;
-class CPDF_Document;
-class IPDF_StructElement;
-
-class IPDF_StructTree {
- public:
-  static IPDF_StructTree* LoadDoc(const CPDF_Document* pDoc);
-  static IPDF_StructTree* LoadPage(const CPDF_Document* pDoc,
-                                   const CPDF_Dictionary* pPageDict);
-
-  virtual ~IPDF_StructTree() {}
-
-  virtual int CountTopElements() const = 0;
-  virtual IPDF_StructElement* GetTopElement(int i) const = 0;
-};
-
-struct CPDF_StructKid {
-  enum { Invalid, Element, PageContent, StreamContent, Object } m_Type;
-
-  union {
-    struct {
-      IPDF_StructElement* m_pElement;
-      CPDF_Dictionary* m_pDict;
-    } m_Element;
-    struct {
-      uint32_t m_PageObjNum;
-      uint32_t m_ContentId;
-    } m_PageContent;
-    struct {
-      uint32_t m_PageObjNum;
-      uint32_t m_ContentId;
-      uint32_t m_RefObjNum;
-    } m_StreamContent;
-    struct {
-      uint32_t m_PageObjNum;
-      uint32_t m_RefObjNum;
-    } m_Object;
-  };
-};
-
-class IPDF_StructElement {
- public:
-  virtual ~IPDF_StructElement() {}
-
-  virtual IPDF_StructTree* GetTree() const = 0;
-  virtual const CFX_ByteString& GetType() const = 0;
-  virtual IPDF_StructElement* GetParent() const = 0;
-  virtual CPDF_Dictionary* GetDict() const = 0;
-  virtual int CountKids() const = 0;
-  virtual const CPDF_StructKid& GetKid(int index) const = 0;
-
-  virtual CPDF_Object* GetAttr(const CFX_ByteStringC& owner,
-                               const CFX_ByteStringC& name,
-                               FX_BOOL bInheritable = FALSE,
-                               FX_FLOAT fLevel = 0.0F) = 0;
-
-  virtual CFX_ByteString GetName(const CFX_ByteStringC& owner,
-                                 const CFX_ByteStringC& name,
-                                 const CFX_ByteStringC& default_value,
-                                 FX_BOOL bInheritable = FALSE,
-                                 int subindex = -1) = 0;
-
-  virtual FX_ARGB GetColor(const CFX_ByteStringC& owner,
-                           const CFX_ByteStringC& name,
-                           FX_ARGB default_value,
-                           FX_BOOL bInheritable = FALSE,
-                           int subindex = -1) = 0;
-
-  virtual FX_FLOAT GetNumber(const CFX_ByteStringC& owner,
-                             const CFX_ByteStringC& name,
-                             FX_FLOAT default_value,
-                             FX_BOOL bInheritable = FALSE,
-                             int subindex = -1) = 0;
-
-  virtual int GetInteger(const CFX_ByteStringC& owner,
-                         const CFX_ByteStringC& name,
-                         int default_value,
-                         FX_BOOL bInheritable = FALSE,
-                         int subindex = -1) = 0;
-};
-
-#endif  // CORE_FPDFDOC_INCLUDE_FPDF_TAGGED_H_