Exactly this.
The reality is, it is his call. He owns the club, along with the Glazers. What he's doing here, is just called politeness.
At no stage during any hiring or firing process, especially of someone as high up as the manager, is Jim NOT going to know about it or be informed about it. It's just ridiculous to assume he would never be the final person to green light it.
He may not be the person to initially decide he needs to go but make no mistake, he will decide in the end, because everyone else works under him.
I ran my own business for 40 years and yes, I didn't make all the decisions, that's why I hired managers. But if there was a big call to make, then that gets fed up the chain of command and ultimately, it was always my decision in the end, after consulting people.
Do people really believe that those managing nuclear weapons on a submarine, are the ones deciding if they get fired or not, without the Prime Minister/Presidents decision? Of course not.
Trust me, if anyone makes the call, it's Jim.