Revert "[TWEAK] - Multi-Z space turfs (#3128)"

This reverts commit 8e88d22.

maps/sierra/sierra_turfs.dm

@@ -22,61 +22,3 @@
 
 /turf/simulated/floor/shuttle_ceiling/sierra/air
 	initial_gas = list("oxygen" = MOLES_O2STANDARD, "nitrogen" = MOLES_N2STANDARD)
-
-/*
-* Z-mimic space turf part
-*/
-
-/proc/GetBelowZlevels(z)
-	RETURN_TYPE(/list)
-	. = list()
-	for(var/level = z, HasBelow(level), level--)
-		. |= level - 1
-
-/proc/GetAboveZlevels(z)
-	RETURN_TYPE(/list)
-	. = list()
-	for(var/level = z, HasAbove(level), level++)
-		. |= level + 1
-
-/turf/space/Initialize()
-	. = ..()
-	update_starlight()
-
-	set_extension(src, /datum/extension/support_lattice)
-
-	if (z_eventually_space)
-		appearance = SSskybox.space_appearance_cache[(((x + y) ^ ~(x * y) + z) % 25) + 1]
-
-	if(!HasBelow(z))
-		return
-	var/turf/below = GetBelow(src)
-
-	if(istype(below, /turf/space))
-		return
-	var/area/A = below.loc
-
-	if(!below.density && (A.area_flags & AREA_FLAG_EXTERNAL))
-		return
-
-	return INITIALIZE_HINT_LATELOAD // oh no! we need to switch to being a different kind of turf!
-
-// Turfs for the non-bottom layers of multi-z space areas
-/turf/space/open
-	icon_state = ""
-	z_flags = ZM_MIMIC_DEFAULTS | ZM_MIMIC_OVERWRITE | ZM_MIMIC_NO_AO
-	z_eventually_space = 0
-
-
-/turf/space/open/Initialize()
-	for (var/level in GetBelowZlevels(z))
-		var/turf/below = locate(x, y, level)
-		if (!istype(below, /turf/space))
-			z_eventually_space = FALSE
-			break
-		if (below.z_eventually_space != 0)
-			z_eventually_space = below.z_eventually_space
-			break
-	if (!z_eventually_space == 0)
-		z_eventually_space = TRUE
-	return ..()