remove dead code
remove dead code

mtCarto/PDAL,DougFirErickson/PDAL,mpgerlek/PDAL-old,lucadelu/PDAL,radiantbluetechnologies/PDAL,mpgerlek/PDAL-old,jwomeara/PDAL,lucadelu/PDAL,radiantbluetechnologies/PDAL,mpgerlek/PDAL-old,DougFirErickson/PDAL,lucadelu/PDAL,mpgerlek/PDAL-old,mtCarto/PDAL,DougFirErickson/PDAL,jwomeara/PDAL,boundlessgeo/PDAL,Sciumo/PDAL,mtCarto/PDAL,Sciumo/PDAL,jwomeara/PDAL,boundlessgeo/PDAL,lucadelu/PDAL,radiantbluetechnologies/PDAL,radiantbluetechnologies/PDAL,Sciumo/PDAL,boundlessgeo/PDAL,DougFirErickson/PDAL,Sciumo/PDAL,boundlessgeo/PDAL,jwomeara/PDAL,mtCarto/PDAL