BUG: remove flag that doesn't exist anymore
BUG: remove flag that doesn't exist anymore

Former-commit-id: e3a913a288f2a099eed0bde6aa54e9c4d16a617b
Former-commit-id: cc8a3a55f3e783bfe1c7f931b90a1fc04d4f2050
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox