Remove dead JBig2 code.

core/src/fxcodec/jbig2/JBig2_Image.h

Index: core/src/fxcodec/jbig2/JBig2_Image.h
diff --git a/core/src/fxcodec/jbig2/JBig2_Image.h b/core/src/fxcodec/jbig2/JBig2_Image.h
index 47215eaa3d1eac1bc65b8795b7df67b111647cdd..c5d27f36b5210ab1c4066ff688a4e8ff43e2144e 100644
--- a/core/src/fxcodec/jbig2/JBig2_Image.h
+++ b/core/src/fxcodec/jbig2/JBig2_Image.h
@@ -44,16 +44,6 @@ class CJBig2_Image : public CJBig2_Object {
                     JBig2ComposeOp op,
                     const FX_RECT* pSrcRect);
 
-  FX_BOOL composeTo_unopt(CJBig2_Image* pDst,
-                          int32_t x,
-                          int32_t y,
-                          JBig2ComposeOp op);
-
-  FX_BOOL composeTo_opt(CJBig2_Image* pDst,
-                        int32_t x,
-                        int32_t y,
-                        JBig2ComposeOp op);
-
   FX_BOOL composeTo_opt2(CJBig2_Image* pDst,
                          int32_t x,
                          int32_t y,
@@ -73,7 +63,6 @@ class CJBig2_Image : public CJBig2_Object {
                       CJBig2_Image* pSrc,
                       JBig2ComposeOp op,
                       const FX_RECT* pSrcRect);
-  CJBig2_Image* subImage_unopt(int32_t x, int32_t y, int32_t w, int32_t h);
 
   CJBig2_Image* subImage(int32_t x, int32_t y, int32_t w, int32_t h);