Delete dead code

include/exiv2/datasets.hpp

@@ -237,11 +237,7 @@ namespace Exiv2 {
            @throw Error if the record is not known;
          */
         static uint16_t recordId(const std::string& recordName);
-        //! Return read-only list of built-in Envelope Record datasets
-        static const DataSet* envelopeRecordList();
-        //! Return read-only list of built-in Application2 Record datasets
-        static const DataSet* application2RecordList();
-        //! Print a list of all dataSets to output stream
+
         static void dataSetList(std::ostream& os);
 
     private:

src/datasets.cpp

@@ -125,11 +125,6 @@ namespace Exiv2 {
                 "(Invalid)", false, false, 0, 0, Exiv2::unsignedShort, IptcDataSets::envelope, ""},
     };
 
-    const DataSet* IptcDataSets::envelopeRecordList()
-    {
-        return envelopeRecord;
-    }
-
     constexpr DataSet application2Record[] = {
         {IptcDataSets::RecordVersion, "RecordVersion", N_("Record Version"),
                 N_("A binary number identifying the version of the Information "
@@ -402,11 +397,6 @@ namespace Exiv2 {
                 false, false, 0, 0, Exiv2::unsignedShort, IptcDataSets::application2, ""},
     };
 
-    const DataSet* IptcDataSets::application2RecordList()
-    {
-        return application2Record;
-    }
-
     constexpr DataSet unknownDataSet{0xffff, "Unknown dataset", N_("Unknown dataset"),
                                         N_("Unknown dataset"),
                                         false, true, 0, 0xffffffff, Exiv2::string,