Closes the Pool. (#23150)

* Delete pool.dm

* Removes usage of PoolOrNew

* Wrap up

code/game/objects/effects/effect_system/effect_system.dm

@@ -19,8 +19,7 @@ would spawn and follow the beaker, even if it is carried or thrown.
 /obj/effect/particle_effect/Destroy()
 	if(ticker)
 		cameranet.updateVisibility(src)
-	..()
-	return QDEL_HINT_PUTINPOOL
+	. = ..()
 
 /datum/effect_system
 	var/number = 3
@@ -57,7 +56,7 @@ would spawn and follow the beaker, even if it is carried or thrown.
 /datum/effect_system/proc/generate_effect()
 	if(holder)
 		location = get_turf(holder)
-	var/obj/effect/E = PoolOrNew(effect_type, location)
+	var/obj/effect/E = new effect_type(location)
 	total_effects++
 	var/direction
 	if(cardinals)

code/game/objects/effects/effect_system/effects_foam.dm

@@ -113,7 +113,7 @@
 
 		for(var/mob/living/L in T)
 			foam_mob(L)
-		var/obj/effect/particle_effect/foam/F = PoolOrNew(src.type, T)
+		var/obj/effect/particle_effect/foam/F = new src.type(T)
 		F.amount = amount
 		reagents.copy_to(F, (reagents.total_volume))
 		F.add_atom_colour(color, FIXED_COLOUR_PRIORITY)
@@ -144,7 +144,7 @@
 
 /datum/effect_system/foam_spread/New()
 	..()
-	chemholder = PoolOrNew(/obj)
+	chemholder = new /obj()
 	var/datum/reagents/R = new/datum/reagents(1000)
 	chemholder.reagents = R
 	R.my_atom = chemholder
@@ -172,7 +172,7 @@
 	if(foundfoam)//If there was already foam where we start, we add our foaminess to it.
 		foundfoam.amount += amount
 	else
-		var/obj/effect/particle_effect/foam/F = PoolOrNew(effect_type, location)
+		var/obj/effect/particle_effect/foam/F = new effect_type(location)
 		var/foamcolor = mix_color_from_reagents(chemholder.reagents.reagent_list)
 		chemholder.reagents.copy_to(F, chemholder.reagents.total_volume/amount)
 		F.add_atom_colour(foamcolor, FIXED_COLOUR_PRIORITY)

code/game/objects/effects/effect_system/effects_other.dm

@@ -36,7 +36,7 @@
 	if(processing)
 		processing = 0
 		if(number < 3)
-			var/obj/effect/particle_effect/steam/I = PoolOrNew(/obj/effect/particle_effect/steam, oldposition)
+			var/obj/effect/particle_effect/steam/I = new /obj/effect/particle_effect/steam(oldposition)
 			number++
 			I.setDir(holder.dir)
 			oldposition = get_turf(holder)
@@ -73,7 +73,7 @@
 		var/turf/T = get_turf(holder)
 		if(T != oldposition)
 			if(!T.has_gravity() || !nograv_required)
-				var/obj/effect/particle_effect/ion_trails/I = PoolOrNew(effect_type, oldposition)
+				var/obj/effect/particle_effect/ion_trails/I = new effect_type(oldposition)
 				set_dir(I)
 				if(fade)
 					flick(fadetype, I)

code/game/objects/effects/effect_system/effects_smoke.dm

@@ -255,7 +255,7 @@
 
 /datum/effect_system/smoke_spread/chem/New()
 	..()
-	chemholder = PoolOrNew(/obj)
+	chemholder = new /obj()
 	var/datum/reagents/R = new/datum/reagents(500)
 	chemholder.reagents = R
 	R.my_atom = chemholder