Remove dead JBig2 code.

core/src/fxcodec/jbig2/JBig2_Context.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_CONTEXT_H_
 #define _JBIG2_CONTEXT_H_
 
 #include <list>
@@ skipping 38 matching lines @@
       IFX_Pause* pPause = NULL);
 
   static void DestroyContext(CJBig2_Context* pContext);
 
   int32_t getFirstPage(uint8_t* pBuf,
                        int32_t width,
                        int32_t height,
                        int32_t stride,
                        IFX_Pause* pPause);
 
-  int32_t getNextPage(uint8_t* pBuf,
-                      int32_t width,
-                      int32_t height,
-                      int32_t stride,
-                      IFX_Pause* pPause);
-
   int32_t getFirstPage(CJBig2_Image** image, IFX_Pause* pPause);
 
-  int32_t getNextPage(CJBig2_Image** image, IFX_Pause* pPause);
   int32_t Continue(IFX_Pause* pPause);
   FXCODEC_STATUS GetProcessiveStatus() { return m_ProcessiveStatus; }
 
  private:
   CJBig2_Context(uint8_t* pGlobalData,
                  FX_DWORD dwGlobalLength,
                  uint8_t* pData,
                  FX_DWORD dwLength,
                  int32_t nStreamType,
                  std::list<CJBig2_CachePair>* pSymbolDictCache,
@@ skipping 70 matching lines @@
   FX_BOOL m_bFirstPage;
   CJBig2_ArithDecoder* m_pArithDecoder;
   CJBig2_GRDProc* m_pGRD;
   JBig2ArithCtx* m_gbContext;
   CJBig2_Segment* m_pSegment;
   FX_DWORD m_dwOffset;
   JBig2RegionInfo m_ri;
   std::list<CJBig2_CachePair>* m_pSymbolDictCache;
 };
 #endif