Does anybody know of any real life examples of planes
certified without stall warning devices?

Aeronca Champ 7CCM---so much as they are not "airplanes" I've not yet seen a
sailplane with a stall warning device. Funny, considering how much time we
spend banked to 45 degrees or more just above stall. Oh that's right, we
become "one" with the plane, don't need no stinken stall warning. Mac