True; I forgot about those (post edited to add footnote).
I would say that if a project goes out of its way to eliminate GNU components, it is only fair to refrain from calling it “GNU”. But it isn’t “Linux” either – that’s still the kernel. There is not, in fact, a name for such distributions. Maybe “Anti-GNU” could work, since to remove the GNU components, you would have to have a rather large anti-GNU zeal. These are rather rare, so I guess the need for a special name has been small.
There are more now not using glibc, such as Alpine Linux (which also uses busybox by default instead of many of the GNU utils). If you neither use glibc or gcc (say you use clang) you are getting a fair way away from the original GNU operating system.
I would say that if a project goes out of its way to eliminate GNU components, it is only fair to refrain from calling it “GNU”. But it isn’t “Linux” either – that’s still the kernel. There is not, in fact, a name for such distributions. Maybe “Anti-GNU” could work, since to remove the GNU components, you would have to have a rather large anti-GNU zeal. These are rather rare, so I guess the need for a special name has been small.