Fix code review issues (planetary_atmos and Initialize())

code/LINDA/LINDA_turf_tile.dm

@@ -54,8 +54,6 @@
 
 	var/atmos_overlay_type = "" //current active overlay
 
-	var/planetary_atmos = FALSE //air will revert to initial_gas_mix over time
-
 /turf/simulated/New()
 	..()
 	if(!blocks_air)

code/game/objects/effects/decals/decal.dm

@@ -3,8 +3,8 @@
 	icon_state = "warningline"
 	layer = TURF_DECAL_LAYER
 
-/obj/effect/turf_decal/Initialize()
-	..()
+/obj/effect/turf_decal/Initialize(mapload)
+	. = ..()
 	qdel(src) // return INITIALIZE_HINT_QDEL <-- Doesn't work
 
 /obj/effect/turf_decal/ComponentInitialize()

code/game/objects/effects/mapping_helpers.dm

@@ -7,11 +7,7 @@
 
 	layer = POINT_LAYER
 
-/obj/effect/baseturf_helper/Initialize()
-	. = ..()
-	return INITIALIZE_HINT_LATELOAD
-
-/obj/effect/baseturf_helper/Initialize()
+/obj/effect/baseturf_helper/Initialize(mapload)
 	. = ..()
 	var/area/thearea = get_area(src)
 	for(var/turf/T in get_area_turfs(thearea, z))
@@ -63,7 +59,7 @@
 	icon_state = ""
 	var/late = FALSE
 
-/obj/effect/mapping_helpers/Initialize()
+/obj/effect/mapping_helpers/Initialize(mapload)
 	..()
 	return late ? INITIALIZE_HINT_LATELOAD : qdel(src) // INITIALIZE_HINT_QDEL <-- Doesn't work
 

code/game/objects/items/weapons/melee/misc.dm

@@ -75,7 +75,7 @@
 	//Things in this list will be instantly splatted.  Flyman weakness is handled in the flyman species weakness proc.
 	var/list/strong_against
 
-/obj/item/melee/flyswatter/Initialize()
+/obj/item/melee/flyswatter/Initialize(mapload)
 	. = ..()
 	strong_against = typecacheof(list(
 					/mob/living/simple_animal/hostile/poison/bees/,

code/game/turfs/simulated/floor/chasm.dm

@@ -122,7 +122,6 @@
 	oxygen = 14
 	nitrogen = 23
 	temperature = 300
-	planetary_atmos = TRUE
 	baseturf = /turf/simulated/floor/chasm/straight_down/lava_land_surface
 	light_range = 1.9 //slightly less range than lava
 	light_power = 0.65 //less bright, too

code/modules/mob/living/simple_animal/hostile/megafauna/swarmer.dm

@@ -63,7 +63,7 @@ GLOBAL_LIST_INIT(AISwarmerCapsByType, list(/mob/living/simple_animal/hostile/swa
 	var/static/list/swarmer_caps
 
 
-/mob/living/simple_animal/hostile/megafauna/swarmer_swarm_beacon/Initialize()
+/mob/living/simple_animal/hostile/megafauna/swarmer_swarm_beacon/Initialize(mapload)
 	. = ..()
 	swarmer_caps = GLOB.AISwarmerCapsByType //for admin-edits
 	for(var/ddir in cardinal)