yeah inline is right there are just little plastic tabs with metal clips on the trim and they just pull off. just be careful to pull straight that way you dont bend/crease the trim or break the plastic tab. thats actually the A-pillar trim.
also take off the piece that the seat belt goes into too. that will make it much easier to get the last clip out. there is a little circle piece on the front of the seat belt piece that you gotta get out first then that just pulls off too.