Remove deprecated maketx code for the old code path
Remove deprecated maketx code for the old code path

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