Notifier still runs, even after I delete the code

[jonathan-x01]

So I came across this really annoying problem. I did a small test with notifier to test the events, and when I confirmed that everything worked, I deleted the whole code, except for it doing it a couple times, which that part I ignored as previous code worked fine. The problem is, even after I deleted all the remnants of the code (Meaning nothing should make it run), it still runs for some odd reason. I forcefully cleared the node cache and everything and it didn't work.

How can I fixed this? Is it a bug, cache issue, what could it be?