Revert "[MIRROR] Replace all secondary flags with bitflags stored in the flags_2 var" (#2457)

ok you know what yeah i think i'll properly mirror https://github.com/Citadel-Station-13/Citadel-Station-13/pull/2411

code/game/area/Space_Station_13_areas.dm.rej

@@ -1,29 +0,0 @@
-diff a/code/game/area/Space_Station_13_areas.dm b/code/game/area/Space_Station_13_areas.dm	(rejected hunks)
-@@ -535,15 +535,15 @@ NOTE: there are two lists of areas in the end of this file: centcom and station
- /area/crew_quarters/toilet/fitness
- 	name = "Fitness Toilets"
- 	icon_state = "toilet"
--	
-+
- /area/crew_quarters/toilet/female
- 	name = "Female Toilets"
- 	icon_state = "toilet"
--	
-+
- /area/crew_quarters/toilet/male
- 	name = "Male Toilets"
- 	icon_state = "toilet"
--	
-+
- /area/crew_quarters/toilet/restrooms
- 	name = "Restrooms"
- 	icon_state = "toilet"
-@@ -1009,7 +1009,7 @@ NOTE: there are two lists of areas in the end of this file: centcom and station
- 
- /area/security/execution/transfer
- 	name = "Transfer Centre"
--	
-+
- /area/security/execution/education
- 	name = "Prisoner Education Chamber"
- 

code/game/area/areas.dm

@@ -58,7 +58,7 @@
 									'sound/ambience/ambigen8.ogg','sound/ambience/ambigen9.ogg',\
 									'sound/ambience/ambigen10.ogg','sound/ambience/ambigen11.ogg',\
 									'sound/ambience/ambigen12.ogg','sound/ambience/ambigen14.ogg')
-	flags_1 = CAN_BE_DIRTY_1
+	flags = CAN_BE_DIRTY
 
 	var/list/firedoors
 	var/firedoors_last_closed_on = 0

code/game/area/areas/centcom.dm

@@ -9,7 +9,7 @@
 	has_gravity = TRUE
 	noteleport = TRUE
 	blob_allowed = FALSE //Should go without saying, no blobs should take over centcom as a win condition.
-	flags_1 = NONE
+	flags = NONE
 
 /area/centcom/control
 	name = "CentCom Docks"
@@ -37,7 +37,7 @@
 	dynamic_lighting = DYNAMIC_LIGHTING_FORCED
 	requires_power = FALSE
 	has_gravity = TRUE
-	flags_1 = NONE
+	flags = NONE
 
 /area/tdome/arena
 	name = "Thunderdome Arena"
@@ -76,7 +76,7 @@
 	requires_power = FALSE
 	has_gravity = TRUE
 	noteleport = TRUE
-	flags_1 = NONE
+	flags = NONE
 
 //Abductors
 /area/abductor_ship
@@ -85,7 +85,7 @@
 	requires_power = FALSE
 	noteleport = TRUE
 	has_gravity = TRUE
-	flags_1 = NONE
+	flags = NONE
 
 //Syndicates
 /area/syndicate_mothership
@@ -95,7 +95,7 @@
 	has_gravity = TRUE
 	noteleport = TRUE
 	blob_allowed = FALSE //Not... entirely sure this will ever come up... but if the bus makes blobs AND ops, it shouldn't aim for the ops to win.
-	flags_1 = NONE
+	flags = NONE
 
 /area/syndicate_mothership/control
 	name = "Syndicate Control Room"
@@ -115,7 +115,7 @@
 	icon_state = "yellow"
 	requires_power = FALSE
 	has_gravity = TRUE
-	flags_1 = NO_DEATHRATTLE_1
+	flags = NO_DEATHRATTLE
 
 /area/ctf/control_room
 	name = "Control Room A"

code/game/area/areas/holodeck.dm

@@ -2,7 +2,7 @@
 	name = "Holodeck"
 	icon_state = "Holodeck"
 	dynamic_lighting = DYNAMIC_LIGHTING_DISABLED
-	flags_1 = 0
+	flags = 0
 	hidden = TRUE
 
 	var/obj/machinery/computer/holodeck/linked

code/game/area/areas/mining.dm

@@ -16,7 +16,7 @@
 	power_light = FALSE
 	outdoors = TRUE
 	ambientsounds = list('sound/ambience/ambimine.ogg')
-	flags_1 = NONE
+	flags = NONE
 
 /area/mine/unexplored
 	name = "Mine"
@@ -30,7 +30,7 @@
 	power_light = FALSE
 	outdoors = TRUE
 	ambientsounds = list('sound/ambience/ambimine.ogg')
-	flags_1 = NONE
+	flags = NONE
 
 /area/mine/lobby
 	name = "Mining Station"
@@ -86,7 +86,7 @@
 /area/lavaland
 	icon_state = "mining"
 	has_gravity = TRUE
-	flags_1 = NONE
+	flags = NONE
 
 /area/lavaland/surface
 	name = "Lavaland"