More PEP8 and PyCharm code inspection fixes (remove unused variables).
More PEP8 and PyCharm code inspection fixes (remove unused variables).

mytardis/mytardis_ngs_ingestor,pansapiens/mytardis_ngs_ingestor,mytardis/mytardis_ngs_ingestor,pansapiens/mytardis_ngs_ingestor