mappings/Makefile: DwC-VegBIEN.specimens.csv: Don't call remove_empty to produce it, because join now deals with empty mappings correctly by still raising a warning. Removed no longer needed intermediate DwC.ci-VegBIEN.specimens.csv.
mappings/Makefile: DwC-VegBIEN.specimens.csv: Don't call remove_empty to produce it, because join now deals with empty mappings correctly by still raising a warning. Removed no longer needed intermediate DwC.ci-VegBIEN.specimens.csv.