I have multiple Gamestops in my area, and only one of them removed their PS2 section. Mostly because there is just not enough room. The space they got at the mall is incredibly tiny.
If the rest of them move to discs in sleeves only, then that's when I'll stop buying PS2 games from them. Give me a case that wasn't dragged behind the car, an instruction booklet that wasn't stomped on, and a disc that doesn't look like someone used it as a beer coaster.