REF: removed not necessary print in straightening
REF: removed not necessary print in straightening

Former-commit-id: 03048b363c4364a6152fa9f1879fb7e84352f17a
Former-commit-id: 4acb59b521519aa696019a5cdd392c0c02e19f32
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox