Hive is censorship resistent in its very nature. However, 99% Hiveans do not interact with blockchain directly, we all rely on front ends, which serve as access point.
These front ends can decide what content will be visible, and can hide posts or comments. One does so now.
Oh, good one! And some interfaces do have the option to see older versions of a post (before editing). You can change your post, but the original version will still be visible!
Which is the great thing on Hive - you cannot pretend you published something else than you actually did. That's the immutability ;)