Drop partial support for "capacity" option in pgpointcloud.
Drop partial support for "capacity" option in pgpointcloud.

See https://github.com/pgpointcloud/pointcloud/issues/48

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