I have managed to get those type of freewheels off a hub.
put a sharp edged drift, or flat screwdriver blade, into one of those 2 holes, then tap it round anti clockwise. This will get the freewheel to unscrew, and the freewheel wont come to bits. It could be reused too.
some freewheels are marked with an arrow, beside those 2 holes. thats the direction to remove the cone face bit. You drift it the other way to remove the complete freewheel
I used to work at a bike shop. I had to take freewheels off of newly unboxed BMX bike shaped objects, as the springs wouldnt engage the pawls in the ratchet grooves.