that's a roll pin, use a small punch to push it out. It will take some effort, a small hammer may help.
If you plan on re-using the pin, you "should" get a replacement. They're designed for a one time use, but could realisticly be used a couple of times.
If you plan on re-using the pin, you "should" get a replacement. They're designed for a one time use, but could realisticly be used a couple of times.