I went and checked on the US site and did not see these listed anymore. Perhaps a glitch about to be fixed, temporary, or possibly something much more insidious?
via a reader on Faeit 212
I noticed that the regular good'ol Space Marine scouts with bolt pistols and combat blades, the Razorback and the trusty Rhino are not available anymore on GW webstore.
After checking a bit, I didn't find any other unit that is not there.