score_reduction_algorithm in BioAlgorithm cannot be changed

While there is a parameter called score_reduction_algorithm in the BioAlgorithm class, this parameter is not taken into account: https://gitlab.idiap.ch/bob/bob.bio.base/-/blob/c746d5f04472ac1ab838865c346144e352a9b295/bob/bio/base/pipelines/vanilla_biometrics/abstract_classes.py#L38