[io] vview.py, remove unused variable (from codacy check)
[io] vview.py, remove unused variable (from codacy check)

radarsat1/siconos,fperignon/siconos,radarsat1/siconos,siconos/siconos,fperignon/siconos,radarsat1/siconos,siconos/siconos,fperignon/siconos,fperignon/siconos,fperignon/siconos,siconos/siconos,radarsat1/siconos,siconos/siconos,radarsat1/siconos