0fde09e5de9e650d22ead25a512d287de3cad731 remove unused variable

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 419 | PASS: 417 | FAIL: 0 | XFAIL: 2 | XPASS: 0

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 417 | PASS: 415 | FAIL: 0 | XFAIL: 2 | XPASS: 0

A full log can be found on karaba in '/tmp/dynare-master-check-wHtnURxs7Q.log'.