remove redundant export of pdal_util
remove redundant export of pdal_util

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