Remove CJBig2_Object, CJBig2_Module, and friends.

core/src/fxcodec/jbig2/JBig2_Module.h

-// 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 _JBIG2_MODULE_H_
-#define _JBIG2_MODULE_H_
-#include "JBig2_Define.h"
-class CJBig2_Module {
- public:
-  virtual ~CJBig2_Module() {}
-
-  virtual void* JBig2_Malloc(FX_DWORD dwSize) = 0;
-
-  virtual void* JBig2_Malloc2(FX_DWORD num, FX_DWORD dwSize) = 0;
-
-  virtual void* JBig2_Malloc3(FX_DWORD num,
-                              FX_DWORD dwSize,
-                              FX_DWORD dwSize2) = 0;
-
-  virtual void* JBig2_Realloc(void* pMem, FX_DWORD dwSize) = 0;
-
-  virtual void JBig2_Free(void* pMem) = 0;
-};
-#endif