Are any of the depictions based on actual likenesses? Or even on a detailed description of the man? If not, then the depictions are not educational with respect to the man, on with respect to how the man has been depicted.
Removing them from the article would be an editorial decision, not "censorship" by any reasonable definition of the word.
No, none of them are. They are works of imagination and that's part of why they are offensive. They give definite material form to what is unknown. If they have value it is as art or as information about those Muslims who have accepted such representations.
One thing that is not understood, it is not just radical Islamists who object to representations of the Prophet, but nearly all mainstream Muslims. I don't think much of Islam, but I can relate to the falseness and, indeed evil, of making things up about Muhammad, which is what all these images amount to, unsourced information from unreliable sources.
Fred