I assume that before you checked it, you cranked the bike and let the oil circulate, & warm up, per the owwners manual. Then checked it on the side stand. Or is it the Center stand, I never can remember, and always have to look in the Owners Manual
(Since mine never leaks on the ground, or Smokes, I rarely ever check it between Oil Changes).
If you did all of the above, then as Sid said, just siphon it down to the correct level.
But I am curious as to how it got overfilled. :shrug:
IMO, I would not run it very far with too much oil. If you know for a fact 4 quarts was put in it. Forget about it because the level can be deceiving. I like to check it after the bike has set several hours or overnight. That'll give you an accurate reading every time. Checking it like the manual says can be tricky if you don't get it hot enough.
If it is really a quart over full, I would drain some. Too much oil is worst than a quart low. Seals are stressed, oil can foam and cause lack of lubrication. Overfilling cause oil to get in the air cleaner.
Some say, just ride it and don't worry about it, it's so simple to check it and drain a little out, why take the chance. My opinion only. Not fact.