Ah right. He just seems like 'Some guy' in the TV show and in the first book, so it's not particularly important. You can have another 'some guy' assume his role if, in the event Martin ever finishes another book before his massive coronary, he turns out to be important.
I've heard that the guy who plays Rakharo is off to film a movie or something, hence the change. But really, at this point, he is still just pretty much 'some guy' again and someone else can assume his role too. Quite a few characters have been cut generally, and rightly so in most cases. There are far too many random characters even for a 1,000 page book nevermind for 10 hours of TV, and