It does still mention it (radio) in the boot up messages

Yes, it's always going to do that. That part is in the closed-source player software, not in open-source kernel. So that can't be changed.

What Mark's fix has done for you is to reduce the amount of time it takes to detect the radio down to its absolute minimum. Most likely, it can't get any faster than it currently is.

Remember, just because it says "loading radio module" on the screen for 1 second, doesn't mean that's the only thing it's doing for that whole second. Maybe it's only loading the radio module for the first 2 milliseconds after it prints that message, and then it's doing other stuff after that which doesn't generate an on-screen message.