Revert "Pyro spec kit now autolinks tank and flamer" (#6504)

# About the pull request

Reverts #6437
Closes #6502

I hadn't considered (or realized, to be truthful) that using an unlinked
pyro flamer was both intended and had unique gameplay associated with it
(OT flamer tanks). I'm reverting 6437 because of this.

:cl:
del: Pyro flamers now start unlinked from their tanks again
/:cl:

code/game/objects/items/storage/large_holster.dm

@@ -195,16 +195,13 @@
 	can_hold = list(/obj/item/weapon/gun/flamer/M240T)
 	has_gamemode_skin = TRUE
 
-/obj/item/storage/large_holster/fuelpack/Initialize(mapload, obj/item/weapon/gun/flamer/M240T/linked_flamer)
+/obj/item/storage/large_holster/fuelpack/Initialize()
 	. = ..()
 	fuel = new /obj/item/ammo_magazine/flamer_tank/large()
 	fuelB = new /obj/item/ammo_magazine/flamer_tank/large/B()
 	fuelX = new /obj/item/ammo_magazine/flamer_tank/large/X()
 	active_fuel = fuel
 	flamer_overlay = overlay_image('icons/obj/items/clothing/backpacks.dmi', "+m240t")
-	if(linked_flamer)
-		linked_flamer.fuelpack = src
-		src.linked_flamer = linked_flamer
 
 /obj/item/storage/large_holster/fuelpack/Destroy()
 	QDEL_NULL(active_fuel)

code/game/objects/items/storage/storage.dm

@@ -773,7 +773,7 @@ W is always an item. stop_warning prevents messaging. user may be null.**/
 	playsound(user.loc, "rustle", 15, TRUE, 6)
 	return TRUE
 
-/obj/item/storage/Initialize(mapload, ...)
+/obj/item/storage/Initialize()
 	. = ..()
 	if (!(storage_flags & STORAGE_QUICK_GATHER))
 		verbs -= /obj/item/storage/verb/toggle_gathering_mode

code/modules/cm_marines/equipment/kit_boxes.dm

@@ -129,8 +129,8 @@
 /obj/item/storage/box/spec/pyro/fill_preset_inventory()
 	new /obj/item/clothing/suit/storage/marine/M35(src)
 	new /obj/item/clothing/head/helmet/marine/pyro(src)
-	var/obj/item/weapon/gun/flamer/M240T/flamer = new(src)
-	new /obj/item/storage/large_holster/fuelpack(src, flamer)
+	new /obj/item/storage/large_holster/fuelpack(src)
+	new /obj/item/weapon/gun/flamer/M240T(src)
 	new /obj/item/ammo_magazine/flamer_tank/large(src)
 	new /obj/item/storage/pouch/flamertank(src)
 	new /obj/item/tool/extinguisher(src)