INST: requirementsConda: removed pip installation with conda (issue #557)
INST: requirementsConda: removed pip installation with conda (issue #557)

Former-commit-id: e0bec883a257ff71066feefba2ab544584ffd429
Former-commit-id: 9702abc173c0bc4302f591a8c7c9e14e60b555cf
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox