Remove dead JBig2 code.

core/src/fxcodec/jbig2/JBig2_Context.h

Index: core/src/fxcodec/jbig2/JBig2_Context.h
diff --git a/core/src/fxcodec/jbig2/JBig2_Context.h b/core/src/fxcodec/jbig2/JBig2_Context.h
index 25261a17bf43488e484fc7cc89f9809a6c7b8811..eb0ceb0eb96adfb48a9801c81a2f58e401df3398 100644
--- a/core/src/fxcodec/jbig2/JBig2_Context.h
+++ b/core/src/fxcodec/jbig2/JBig2_Context.h
@@ -56,15 +56,8 @@ class CJBig2_Context : public CJBig2_Object {
                        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; }