You need a hex wrench (I believe a size "5") but if you are unfamiliar with that, you might want to hold-off cutting anything with a hack saw. And that last spacer must remain.

Also that stem is angled and can be "flipped".

BTW, screw aesthetics. Ride for comfort, speed and efficiency. I wouldn't cut anything before I had ridden in a new position for at least 200miles.

Oh, what brand and model handlebars. I like (look like a short reach, deep drop)