examples/nanshe_learner_multiprocessing.json: Added note about 3D support for remove_zeroed_lines.
examples/nanshe_learner_multiprocessing.json: Added note about 3D support for remove_zeroed_lines.

nanshe-org/nanshe,DudLab/nanshe,jakirkham/nanshe,DudLab/nanshe,nanshe-org/nanshe,jakirkham/nanshe