removes atmos history (#67317)

Removes one unused global list and removes the other one that was used only 3 times.

code/datums/elements/atmos_requirements.dm

@@ -47,7 +47,7 @@
 		return FALSE
 
 	var/open_turf_gases = open_turf.air.gases
-	open_turf.air.assert_gases(arglist(GLOB.hardcoded_gases))
+	open_turf.air.assert_gases(/datum/gas/oxygen, /datum/gas/nitrogen, /datum/gas/carbon_dioxide, /datum/gas/plasma)
 
 	var/plas = open_turf_gases[/datum/gas/plasma][MOLES]
 	var/oxy = open_turf_gases[/datum/gas/oxygen][MOLES]

code/datums/helper_datums/teleport.dm

@@ -140,9 +140,10 @@
 		return
 
 	var/list/floor_gases = floor_gas_mixture.gases
+	var/list/gases_to_check = list(/datum/gas/oxygen, /datum/gas/nitrogen, /datum/gas/carbon_dioxide, /datum/gas/plasma)
 	var/trace_gases
 	for(var/id in floor_gases)
-		if(id in GLOB.hardcoded_gases)
+		if(id in gases_to_check)
 			continue
 		trace_gases = TRUE
 		break

code/modules/atmospherics/gasmixtures/gas_types.dm

@@ -1,7 +1,3 @@
-GLOBAL_LIST_INIT(hardcoded_gases, list(/datum/gas/oxygen, /datum/gas/nitrogen, /datum/gas/carbon_dioxide, /datum/gas/plasma)) //the main four gases, which were at one time hardcoded
-//Now this is what I call history
-GLOBAL_LIST_INIT(nonreactive_gases, typecacheof(list(/datum/gas/oxygen, /datum/gas/nitrogen, /datum/gas/carbon_dioxide, /datum/gas/pluoxium))) //unable to react amongst themselves
-
 /proc/meta_gas_list()
 	. = subtypesof(/datum/gas)
 	for(var/gas_path in .)

code/modules/mob/living/simple_animal/simple_animal.dm

@@ -325,7 +325,7 @@
 		var/turf/open/ST = loc
 		if(ST.air)
 			var/ST_gases = ST.air.gases
-			ST.air.assert_gases(arglist(GLOB.hardcoded_gases))
+			ST.air.assert_gases(/datum/gas/oxygen, /datum/gas/nitrogen, /datum/gas/carbon_dioxide, /datum/gas/plasma)
 
 			var/plas = ST_gases[/datum/gas/plasma][MOLES]
 			var/oxy = ST_gases[/datum/gas/oxygen][MOLES]