So, in other words there is no reason to not rescind this other than you find it annoying.
I didn't find those "other words" anywhere in my post. Perhaps you should have spent more time reading and absorbing what I wrote.
The bull shouldn't be rescinded because its no longer relevant, none of the kingdoms it was issued to exist. As the bull referred in the main to Islamic lands (formerly Christian lands), rescinding it would encourage the Muslims in jihad across large swaths of Europe.
What could possibly be gained by rescinding it? Do you really think that if not for the bull the America's would now be full of stone-age cultures riding unicorns and farting rainbows?