Actually, the ACTUAL definition of censorship doesn't define who censors what. It can be a creator or an outside force.
The oxford definition is
"The suppression or prohibition of any parts of books, films, news, etc. that are considered obscene, politically unacceptable, or a threat to security"
I'm not comparing either subject being censored as the same. That's not my argument. But its still censorship nonetheless, regardless of who does it. And last I checked, the production team of SU gave the censorship the ok, so they agreed to it.