deepseg_sc/core: Removed resampling in the 3D case
deepseg_sc/core: Removed resampling in the 3D case

Isotropic resampling should have been done before, once, instead of re-doing it here.


Former-commit-id: b5ea13a4689903b08546b9a10f03c6fb7b60fcef
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox