Tool-Free. Tie a string around the bridge pin and pull the string to pop the pin out. If you don't have any tools handy but you can find a piece of string, tie a loop around the top of the bridge pin and pull it tight. Then, pull the end of the string up and out to release the bridge pin.
Are bridge pins necessary?
Bridge pins are small, and yet very necessary part of every acoustic guitar. Because of that, it's natural to think about whether bridge pins affect tone of your guitar in any way.