Revert "put checkout on clone target for doc building"
Revert "put checkout on clone target for doc building"

This reverts commit b203b5a846d5545eecaeb8c794ce44fff4e6bee5.

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