This is actually easy and simple.
1. Take a knife, cut through the thinner end, make sure everything is cut.
2. Now you need cut the other end. This end is harder, you have more area to cut.
3. Make sure anything connected to bone is unconnected.
4. Pull bone out. Now you have it done!
* I found some old pictures earlier, with more step-by-step pictures, might help you better understand.
