You don't want to use plate switch on pcb mount. It won't be sturdy enough without the pins to keep them in place. If you want to change switch type on pcb mount with plate switch, it would be best to leave the original switch soldered, and simply open the tops and switch the stem and/or springs.
Some plate mount boards actually use pcb mount switches too, so it just depends on the board in question if you would even need to remove the pins or not.