Or just leave it as is. It'll run fine that way.

If you need convincing, open the throttle to just beyond half open. That's about where it will be when the engine is at full rpm. Now look at the throttle plate and take a stab at how much air you could possibly stuff through that opening.

Or, if it'll make you sleep better, go ahead with your plan for the hole.

That should open another discussion. ;^)