Removes MORE hardcoded zlevel numbers (#13882)

code/modules/events/sentience.dm

@@ -10,7 +10,7 @@
 
 	for(var/mob/living/simple_animal/L in GLOB.alive_mob_list)
 		var/turf/T = get_turf(L)
-		if (T.z != 1)
+		if (!is_station_level(T.z))
 			continue
 		if(!(L in GLOB.player_list) && !L.mind && (L.sentience_type == sentience_type))
 			potential += L

code/modules/mining/ores_coins.dm

@@ -273,7 +273,7 @@ GLOBAL_LIST_INIT(sand_recipes, list(\
 		icon_state = "Gibtonite active"
 		var/turf/bombturf = get_turf(src)
 		var/notify_admins = 0
-		if(z != 5)//Only annoy the admins ingame if we're triggered off the mining zlevel
+		if(!is_mining_level(z))//Only annoy the admins ingame if we're triggered off the mining zlevel
 			notify_admins = 1
 
 		if(notify_admins)

code/modules/mob/living/simple_animal/bot/bot.dm

@@ -756,7 +756,7 @@ Pass a positive integer as an argument to override a bot's default speed.
 
 // send a radio signal with multiple data key/values
 /mob/living/simple_animal/bot/proc/post_signal_multiple(var/freq, var/list/keyval)
-	if(z != 1) //Bot control will only work on station.
+	if(!is_station_level(z)) //Bot control will only work on station.
 		return
 	var/datum/radio_frequency/frequency = SSradio.return_frequency(freq)
 	if(!frequency)