remove spurious gdal dependency
remove spurious gdal dependency

mpgerlek/PDAL-old,radiantbluetechnologies/PDAL,mpgerlek/PDAL-old,radiantbluetechnologies/PDAL,radiantbluetechnologies/PDAL,mpgerlek/PDAL-old,mpgerlek/PDAL-old,radiantbluetechnologies/PDAL