Removes a sleep from broodmother code (tgstation#86580)

## About The Pull Request

We're calling spiral turfs which (the thing it does) is returns turfs in
a spiral pattern order, and then RANDOMLY PICKING FROM THAT LIST

So this is just a waste

Also cleaned up the proc some

code/modules/mob/living/simple_animal/hostile/mining_mobs/elites/goliath_broodmother.dm

@@ -50,7 +50,7 @@
 								/datum/action/innate/elite_attack/rage,
 								/datum/action/innate/elite_attack/call_children)
 
-	var/rand_tent = 0
+	COOLDOWN_DECLARE(random_tentacle)
 	var/list/mob/living/simple_animal/hostile/asteroid/elite/broodmother_child/children_list = list()
 
 /mob/living/simple_animal/hostile/asteroid/elite/broodmother/Initialize(mapload)
@@ -108,15 +108,16 @@
 	. = ..()
 	if(!.) //Checks if they are dead as a rock.
 		return
-	if(health < maxHealth * 0.5 && rand_tent < world.time)
-		rand_tent = world.time + 30
-		var/tentacle_amount = 5
-		if(health < maxHealth * 0.25)
-			tentacle_amount = 10
-		var/tentacle_loc = spiral_range_turfs(5, get_turf(src))
-		for(var/i in 1 to tentacle_amount)
-			var/turf/t = pick_n_take(tentacle_loc)
-			new /obj/effect/goliath_tentacle/broodmother(t, src)
+	if(health >= maxHealth * 0.5 || !COOLDOWN_FINISHED(src, random_tentacle))
+		return
+	COOLDOWN_START(src, random_tentacle, 3 SECONDS)
+	var/tentacle_amount = 5
+	if(health < maxHealth * 0.25)
+		tentacle_amount = 10
+	var/list/possible_turfs = RANGE_TURFS(5, get_turf(src))
+	for(var/i in 1 to tentacle_amount)
+		var/turf/innsmouth = pick_n_take(possible_turfs)
+		new /obj/effect/goliath_tentacle/broodmother(innsmouth, src)
 
 /mob/living/simple_animal/hostile/asteroid/elite/broodmother/proc/tentacle_patch(target)
 	ranged_cooldown = world.time + 15