Move implementation details from tags.cpp to tags_int.cpp

include/exiv2/tags.hpp

@@ -112,11 +112,6 @@ namespace Exiv2 {
         ExifTags& operator=(const ExifTags& rhs);
 
     public:
-        //! Return read-only list of built-in groups
-        static const GroupInfo* groupList();
-        //! Return read-only list of built-in \em groupName tags.
-        static const TagInfo* tagList(const std::string& groupName);
-
         //! Print a list of all standard Exif tags to output stream
         static void taglist(std::ostream& os);
         //! Print the list of tags for \em groupName

src/CMakeLists.txt

@@ -113,6 +113,7 @@ set( LIBEXIV2_PRIVATE_SRC
     samsungmn_int.cpp
     sigmamn_int.cpp
     sonymn_int.cpp
+    tags_int.cpp
     tiffcomposite_int.cpp
     tiffimage_int.cpp
     tiffvisitor_int.cpp