There is nothing to do about baby acne. It's totally normal.
Little kids live inside us until they are born and then exposed to air. Their skin starts "breathing" and there are things in their little bodies that come out through their skin.
(That's how my pediatrician explained it more or less).
It clears up on it's own. Keep the baby's face clean but don't use anything harsh or drying. This really will clear up. My daughter didn't have it at all but my son did and he has a perfect complexion. (So far and he's 15).
If it's still there at his next well baby check, ask the doctor, but unless it's scaley or peeling or something, it should go away on it's own.
Best wishes and congratulations on your new baby!