OPT: comment unused option. Fix #871
OPT: comment unused option. Fix #871

Former-commit-id: a21ac0f2c790b633d315999f195d0d2920595504 [formerly be23bf3e004bddb2955e26ea284e58cc56f3e82d]
Former-commit-id: 73109ca53524e65e8779a120eb719b59fb162332
Former-commit-id: bc1d0afd2a68461edcc0d7bb6235d5a0d37a133f
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox