Remove --hash description, no longer used by maketx
Remove --hash description, no longer used by maketx

sambler/oiio,cwilling/oiio,OpenImageIO/oiio,lgritz/oiio,scott-wilson/oiio,lgritz/oiio,YangYangTL/oiio,sambler/oiio,micler/oiio,bdeluca/oiio,bdeluca/oiio,lgritz/oiio,scott-wilson/oiio,YangYangTL/oiio,mcanthony/oiio,lgritz/oiio,scott-wilson/oiio,mcanthony/oiio,sambler/oiio,scott-wilson/oiio,bdeluca/oiio,cwilling/oiio,mcanthony/oiio,bdeluca/oiio,micler/oiio,micler/oiio,OpenImageIO/oiio,OpenImageIO/oiio,mcanthony/oiio,OpenImageIO/oiio,YangYangTL/oiio,cwilling/oiio,micler/oiio,cwilling/oiio,sambler/oiio,YangYangTL/oiio