No they don't just slide out.
They have two extensions (?) perpendicular to the bar itself, so that you can pinch them with your fingers. Very helpful but it prevents the bars from slipping out.
There must be a way to remove them somehow but I don't see it, unless they are screwed on?
They’re just quick release spring bars they should just slide out . Or rip out with pliers and replace with normal spring bars of the same size?