Processing Audit Part 1 (#22803)

Oh look at that, every modular computer in existence was always
processing at all times, regardless of if it was actually needed.
There's a couple more small examples I caught in my first pass, but all
of the rest are very low incidence. There are of course a very large
number of modular computers at any one point in time.

code/modules/psionics/abilities/nlom_eyes.dm

@@ -55,7 +55,7 @@
 /obj/item/spell/track/process()
 	if(!tracking)
 		icon_state = "track"
-		return
+		return PROCESS_KILL
 
 	if(!tracked)
 		icon_state = "track_unknown"