It did exist, once.
It was over twenty-two thousand words of filler involving commentary on Wikipedia articles, singalongs, thwarted bad sex scenes, no contractions, and Grim being called "Grim the Scary".
Basically, it was the author going "hey, I've never had a chance to try out all those dirty word count tricks in Nanowrimo, why not do that now?"
Yep.
(That Grim is called Grim the Scary is important. Remember that.)
(Twenty-two thousand words is also important. Remember that too.)
(The bad thwarted sex scene is not important. You can forget that part.)
And since nobody has time for patent nonsen... okay, you clearly have time for SOME patent nonsense since you're reading this. But The Chapter That Doesn't Exist is an overly long extended gag. So just laugh at the idea of a very long nonsense filler chapter that involved all those things I mentioned above, and secretly breathe a sigh of relief that you dodged that bullet. I won't mind.
Done that?
On to the final chapter, then!