can someone tell me how to remove the front brake calipers?

can someone tell me how to remove the front brake calipers?

Take the wheel off, take the 2 caliper bolts off, unbolt the brake line, done. If you want the caliper bracket off too, take those two bolts off.

see my proplem is the bottom caliper bolt, the head looks just like a regular bolt but the top caliper bolt, the head is kinda of rounded and i hav no clue how to remove it..it looks more like a pin than a bolt