Censorship requires a government banning something. This is just a rewrite by a private company. You still have the opportunity to buy or check out the original text.
While I would probably lean toward the original text, there are some books by Twain where he goes overboard with dialectic gibberish. Make it unreadable.
I found the book completely readable in high school without any isssues. How about modernizing Shakespeare’s various dialects too?