Remove them? Sell them? Throw them out?
They are completely removable if that's what you're asking. Either a T50 or T55 holding them in (I can never remember), the shoulder belt/reel portion will be behind the trim and can be removed from behind, and the buckle portion is just bolted to the floor.
The mounting locations make good tie down points or mounting points for equipment.
Yep, just be careful pulling the panels you can get new clips but its avoidable if you're careful. It'll kinda stay attached around the seat belt until you unbolt it. It'll be clear when you start taking it apart.
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