I just wondered if this existed, and it does. That’s the awesome power of the mind…
http://calvinwithouthobbes.tumblr.com/
Although whoever made the site could only be bothered to make these two comics, which would have required a minum of photoshop skill…
Eighth Worst Blog Ever 
Also there must be better C&H comics to do this with?
Yeah, and it doesn’t make much sense anyway, because he’s already imaginary, so from other people’s point of view Calvin’s just talking to himself all the time. I think maybe they chose these strips because they were the easiest to edit Hobbes out of…