REF: fmri_moco: removed some FSL dependences
REF: fmri_moco: removed some FSL dependences

Former-commit-id: 9d1d77039388e99573d25027e6c0df7742abcb25
Former-commit-id: ef042fa8c50bb59f83e5cef4f1ab41a1c35b4103
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox