Remove unnecessary typedef declarations.
Remove unnecessary typedef declarations.

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