[mechanics] remove a left-over debugging trace
[mechanics] remove a left-over debugging trace

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