libkorder: remove mention of Dynare++ in the journal

By the way, use PACKAGE_VERSION macro (instead of VERSION), for consistency
with the preprocessor.

mex/sources/libkorder/kord/journal.cc

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2004-2011 Ondra Kamenik
- * Copyright © 2019-2022 Dynare Team
+ * Copyright © 2019-2023 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -200,13 +200,8 @@ endrec(JournalRecord &rec)
 void
 Journal::printHeader()
 {
-  *this << "Dynare++ v. " << VERSION << '\n'
+  *this << "Dynare, version " << PACKAGE_VERSION << '\n'
         << '\n'
-        << "Copyright © 2004-2011 Ondra Kamenik\n"
-        << "Copyright © 2019-2020 Dynare Team\n"
-        << "Dynare++ comes with ABSOLUTELY NO WARRANTY and is distributed under the GNU GPL,\n"
-        << "version 3 or later (see https://www.gnu.org/licenses/gpl.html)\n"
-        << "\n\n"
         << "System info: ";
 #ifndef _WIN32
   utsname info;