Actually, you don't need to pull the pins out of the rollers. If you un-bolt the window regulator, it gives you enough room to slide the rollers all the way out the end of the channel inside the door, but when you re-install, you need to adjust the window regulator all over again, but that aint no big deal.
In addition to that, when re-installing, you can assemble the rollers with the clips in them in the window channel prior to inserting the glass and channel assembly back into the door. Lower the glass down enough to align the rollers with the pins on the regulator arms and press then rollers onto the pins with your hand.