install_sct: remove dev mode as it has become pretty useless
install_sct: remove dev mode as it has become pretty useless


Former-commit-id: f3da80299722584eaff9c3842021900348c5eb4b
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox