You can leave it alone.
Why some people choose to remove it is because it's a $10 part that's hidden away where you can't see it. If it fux up and starts relieving oil pressure when it shouldn't, then you can chase the low oil pressure problem for days and not think to look in the oilpan. With no AFM solenoids to protect, it serves no useful purpose after AFM delete....it can only cause grief IMO.
(Maybe think of it like having a low pressure shower at home...you can change faucets and filters and dig up the yard, you're never going to think of looking inside the wall for a cracked pipe).