Remove obsolete code comment [ci skip]

ogr/ogrsf_frmts/gpkg/ogrgeopackagedatasource.cpp

@@ -188,12 +188,6 @@ static const char *pszCREATE_GPKG_GEOMETRY_COLUMNS =
     "(srs_id)"
     ")";
 
-/* Only recent versions of SQLite will let us muck with application_id */
-/* via a PRAGMA statement, so we have to write directly into the */
-/* file header here. */
-/* We do this at the *end* of initialization so that there is */
-/* data to write down to a file, and we will have a writable file */
-/* once we close the SQLite connection */
 OGRErr GDALGeoPackageDataset::SetApplicationAndUserVersionId()
 {
     CPLAssert(hDB != nullptr);