That first one might actually be it. There’s an old motion light on that side of the house that I still need to change out. Good call.

or fan/light switches but no light kit was installed with the fan

Or no fan was installed with the light.

I was going to get smug about how I was diligent enough to blank off the switch when I removed my garbage disposal, but then I remembered I have switches that do nothing in my fanless bedrooms.