Removes duplicate definitions of /datum/gamemode on almost every gamemode file (#25219)

* Why did every gamemode do this :(

* Contra request

code/game/gamemodes/changeling/changeling.dm

@@ -1,11 +1,7 @@
 
-
 // This list is basically a copy of GLOB.greek_letters, but it also removes letters when a changeling spawns in with that ID
 GLOBAL_LIST_INIT(possible_changeling_IDs, list("Alpha","Beta","Gamma","Delta","Epsilon","Zeta","Eta","Theta","Iota","Kappa","Lambda","Mu","Nu","Xi","Omicron","Pi","Rho","Sigma","Tau","Upsilon","Phi","Chi","Psi","Omega"))
 
-/datum/game_mode
-	var/list/datum/mind/changelings = list()
-
 /datum/game_mode/changeling
 	name = "changeling"
 	config_tag = "changeling"

code/game/gamemodes/cult/cult_mode.dm

@@ -1,6 +1,3 @@
-/datum/game_mode
-	var/datum/team/cult/cult_team
-
 /datum/game_mode/proc/get_cult_team()
 	if(!cult_team)
 		new /datum/team/cult() // assignment happens in create_team()

code/game/gamemodes/game_mode.dm

@@ -45,6 +45,51 @@
 	/// Each item in this list can only be rolled once on average.
 	var/list/single_antag_positions = list("Head of Personnel", "Chief Engineer", "Research Director", "Chief Medical Officer", "Quartermaster")
 
+	/// A list of all minds which have the traitor antag datum.
+	var/list/datum/mind/traitors = list()
+	/// An associative list with mindslave minds as keys and their master's minds as values.
+	var/list/datum/mind/implanted = list()
+	/// A list of all minds which have the changeling antag datum
+	var/list/datum/mind/changelings = list()
+	/// A list of all minds which have the vampire antag datum
+	var/list/datum/mind/vampires = list()
+	/// A list of all minds which are thralled by a vampire
+	var/list/datum/mind/vampire_enthralled = list()
+	/// A list of all minds which have the wizard special role
+	var/list/datum/mind/wizards = list()
+	/// A list of all minds that are wizard apprentices
+	var/list/datum/mind/apprentices = list()
+
+	/// The cult team datum
+	var/datum/team/cult/cult_team
+
+	/// How many abductor teams do we have
+	var/abductor_teams = 0
+	/// A list which contains the minds of all abductors
+	var/list/datum/mind/abductors = list()
+	/// A list which contains the minds of all abductees
+	var/list/datum/mind/abductees = list()
+
+	/// A list of all the nuclear operatives' minds
+	var/list/datum/mind/syndicates = list()
+
+	/// A list of all the minds of head revolutionaries
+	var/list/datum/mind/head_revolutionaries = list()
+	/// A list of all the minds of revolutionaries
+	var/list/datum/mind/revolutionaries = list()
+	/// The revololution team datum
+	var/datum/team/revolution/rev_team
+
+	/// A list of all the minds with the superhero special role
+	var/list/datum/mind/superheroes = list()
+	/// A list of all the minds with the supervillain special role
+	var/list/datum/mind/supervillains = list()
+	/// A list of all the greyshirt minds
+	var/list/datum/mind/greyshirts = list()
+
+	/// A list of all the minds that have the ERT special role
+	var/list/datum/mind/ert = list()
+
 /datum/game_mode/proc/announce() //to be calles when round starts
 	to_chat(world, "<B>Notice</B>: [src] did not define announce()")
 

code/game/gamemodes/miniantags/abduction/abduction.dm

@@ -1,8 +1,3 @@
-/datum/game_mode
-	var/abductor_teams = 0
-	var/list/datum/mind/abductors = list()
-	var/list/datum/mind/abductees = list()
-
 /datum/game_mode/abduction
 	name = "abduction"
 	config_tag = "abduction"

code/game/gamemodes/nuclear/nuclear.dm

@@ -1,8 +1,5 @@
 #define NUKESCALINGMODIFIER 6
 
-/datum/game_mode
-	var/list/datum/mind/syndicates = list()
-
 /proc/issyndicate(mob/living/M as mob)
 	return istype(M) && M.mind && SSticker && SSticker.mode && (M.mind in SSticker.mode.syndicates)
 

code/game/gamemodes/revolution/revolution.dm

@@ -4,11 +4,6 @@
 #define REV_VICTORY 1
 #define STATION_VICTORY 2
 
-/datum/game_mode
-	var/list/datum/mind/head_revolutionaries = list()
-	var/list/datum/mind/revolutionaries = list()
-	var/datum/team/revolution/rev_team
-
 /datum/game_mode/revolution
 	name = "revolution"
 	config_tag = "revolution"

code/game/gamemodes/traitor/traitor.dm

@@ -1,9 +1,3 @@
-/datum/game_mode
-	/// A list of all minds which have the traitor antag datum.
-	var/list/datum/mind/traitors = list()
-	/// An associative list with mindslave minds as keys and their master's minds as values.
-	var/list/datum/mind/implanted = list()
-
 /datum/game_mode/traitor
 	name = "traitor"
 	config_tag = "traitor"

code/game/gamemodes/vampire/vampire_gamemode.dm

@@ -1,7 +1,3 @@
-/datum/game_mode
-	var/list/datum/mind/vampires = list()
-	var/list/datum/mind/vampire_enthralled = list() //those controlled by a vampire
-
 /datum/game_mode/vampire
 	name = "vampire"
 	config_tag = "vampire"

code/game/gamemodes/wizard/wizard.dm

@@ -1,7 +1,3 @@
-/datum/game_mode
-	var/list/datum/mind/wizards = list()
-	var/list/datum/mind/apprentices = list()
-
 /datum/game_mode/wizard
 	name = "wizard"
 	config_tag = "wizard"

code/modules/mob/living/carbon/superheroes.dm

@@ -1,8 +1,3 @@
-/datum/game_mode
-	var/list/datum/mind/superheroes = list()
-	var/list/datum/mind/supervillains = list()
-	var/list/datum/mind/greyshirts = list()
-
 /datum/superheroes
 	var/name
 	var/desc

code/modules/response_team/ert.dm

@@ -4,9 +4,6 @@
 #define ERT_TYPE_RED		2
 #define ERT_TYPE_GAMMA		3
 
-/datum/game_mode
-	var/list/datum/mind/ert = list()
-
 GLOBAL_LIST_EMPTY(response_team_members)
 GLOBAL_VAR_INIT(responseteam_age, 21) // Minimum account age to play as an ERT member
 GLOBAL_DATUM(active_team, /datum/response_team)