I listed that I would be doing robotics senior year on my college apps, but I am thinking of quitting. Will colleges find out?
You should notify them and explain why you decided to quit like it was taking away from your effort at school or something
If you did it first semester and then dropped off your involvement that should be fine. I would go to some meetings this semester but you don’t need to be super-involved.
I say don’t notify them, it doesn’t really matter
Agree, totally doesn’t matter, applications are in. Do NOT notify them, that would be silly to do so.