OPT: remove function that is not used anymore
OPT: remove function that is not used anymore

Former-commit-id: 041d7388354b9e9e0cd4d24d2469fe94ed0fbc4e [formerly 7ca791eaf0adaa760ba381be0a1b4ae2c24a4642]
Former-commit-id: 407084e7274e04b0e4642b488d2186d6732e0663
Former-commit-id: c69323ef5fa2b8daf7092d0bb2f627075bffbcec
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox