Remove score normalization from here
Score normalization mechanisms are implemented as a pipeline in bob.bio.base
(https://gitlab.idiap.ch/bob/bob.bio.base/-/blob/dask-pipelines/bob/bio/base/script/vanilla_biometrics_ztnorm.py).
Shall we remove the score-normalization bits from here? The score-normalization bits are placed here for historical reasons.
Thanks