Clean compiling warnings on Linux (part2)

xfa/src/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp

Index: xfa/src/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp
diff --git a/xfa/src/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp b/xfa/src/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp
index 408a5980ff021f4f0dfd4d4b670871532e504418..25438f389a8e3598586baddf466fcead275075f4 100644
--- a/xfa/src/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp
+++ b/xfa/src/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp
@@ -86,21 +86,6 @@ uint8_t* CBC_DataMatrixWriter::Encode(const CFX_WideString& contents,
   delete placement;
   return result;
 }
-uint8_t* CBC_DataMatrixWriter::Encode(const CFX_ByteString& contents,
-                                      BCFORMAT format,
-                                      int32_t& outWidth,
-                                      int32_t& outHeight,
-                                      int32_t& e) {
-  return NULL;
-}
-uint8_t* CBC_DataMatrixWriter::Encode(const CFX_ByteString& contents,
-                                      BCFORMAT format,
-                                      int32_t& outWidth,
-                                      int32_t& outHeight,
-                                      int32_t hints,
-                                      int32_t& e) {
-  return NULL;
-}
 CBC_CommonByteMatrix* CBC_DataMatrixWriter::encodeLowLevel(
     CBC_DefaultPlacement* placement,
     CBC_SymbolInfo* symbolInfo,