Don't remove the passenger seat. It may be weight sensing (I'm not sure of your car's year, but this started sometime in the 2000's) so the airbag only goes off when people over 50 lbs or so are sitting in the seat.
If you remove it and reinstall you may end up with a constant airbag warning light until you get a dealer to recalibrate the seat. That would cost more than $100 most likely.
If you remove it and reinstall you may end up with a constant airbag warning light until you get a dealer to recalibrate the seat. That would cost more than $100 most likely.