Convert a fuck ton of machines to Initialize() (#2985)

Needs testing, but shouldn't break anything. Also adds Destroy() to the SMES base class.

code/modules/shieldgen/shield_capacitor.dm

@@ -19,13 +19,15 @@
 	var/charge_rate = 100000	//100 kW
 	var/obj/machinery/shield_gen/owned_gen
 
-/obj/machinery/shield_capacitor/New()
-	spawn(10)
-		for(var/obj/machinery/shield_gen/possible_gen in range(1, src))
-			if(get_dir(src, possible_gen) == src.dir)
-				possible_gen.owned_capacitor = src
-				break
+/obj/machinery/shield_capacitor/Initialize()
 	..()
+	return INITIALIZE_HINT_LATELOAD
+
+/obj/machinery/shield_capacitor/LateInitialize()
+	for(var/obj/machinery/shield_gen/possible_gen in range(1, src))
+		if(get_dir(src, possible_gen) == src.dir)
+			possible_gen.owned_capacitor = src
+			break
 	
 /obj/machinery/shield_capacitor/emag_act(var/remaining_charges, var/mob/user)
 	if(prob(75))

code/modules/shieldgen/shield_gen_external.dm

@@ -4,9 +4,6 @@
 /obj/machinery/shield_gen/external
 	name = "hull shield generator"
 
-/obj/machinery/shield_gen/external/New()
-	..()
-
 //NOT MULTIZ COMPATIBLE
 //Search for space turfs within range that are adjacent to a simulated turf.
 /obj/machinery/shield_gen/external/get_shielded_turfs()