Defining Part 4 - Code cleanup toward defines (... and the rest) (#19388)

* I wasn't done

* nits

code/controllers/subsystem/shuttles.dm

@@ -187,7 +187,7 @@ SUBSYSTEM_DEF(shuttle)
 	var/callShuttle = 1
 
 	for(var/thing in GLOB.shuttle_caller_list)
-		if(istype(thing, /mob/living/silicon/ai))
+		if(isAI(thing))
 			var/mob/living/silicon/ai/AI = thing
 			if(AI.stat || !AI.client)
 				continue

code/controllers/subsystem/ticker.dm

@@ -521,7 +521,7 @@ SUBSYSTEM_DEF(ticker)
 
 	for(var/mob/living/silicon/robot/robo in GLOB.mob_list)
 
-		if(istype(robo,/mob/living/silicon/robot/drone))
+		if(isdrone(robo))
 			dronecount++
 			continue