Removes several unused properties which had types that don't even exist, picked up by OpenDream (#16648)

* Makes OpenDream compilation ignore the max BYOND version stuff

OD doesn't really have a consistent, exact BYOND version it's even trying to mimic, necessarily, so

* Removes dead members with types that don't even exist

OpenDream picked these up after I made it actually require that typed members actually get their type defined at any point.

Some interesting examples include a riding_datum member that is some left-over before we moved riding into a component, and a reference to some old aspect of goonchat.

code/_compile_options.dm

@@ -63,8 +63,12 @@
 #define MAX_BYOND_MAJOR 514
 #define MAX_BYOND_MINOR 1589
 
-///Uncomment to bypass the max version check. Note: This will likely break the game, only use if you know what you're doing
-//#define IGNORE_MAX_BYOND_VERSION
+// You can define IGNORE_MAX_BYOND_VERSION to bypass the max version check.
+// Note: This will likely break the game, especially any extools/auxtools linkage. Only use if you know what you're doing!
+#ifdef OPENDREAM // Thanks, Altoids!
+#define IGNORE_MAX_BYOND_VERSION
+#endif
+
 #if ((DM_VERSION > MAX_BYOND_MAJOR) || (DM_BUILD > MAX_BYOND_MINOR)) && !defined(IGNORE_MAX_BYOND_VERSION)
 #error Your version of BYOND is too new to compile this project. Download version 514.1589 at www.byond.com/download/build/514/514.1589_byond.exe
 #endif

code/datums/components/crafting/crafting.dm

@@ -52,7 +52,6 @@
 
 	var/cur_category = CAT_NONE
 	var/cur_subcategory = CAT_NONE
-	var/datum/action/innate/crafting/button
 	var/display_craftable_only = FALSE
 	var/display_compact = TRUE
 

code/game/gamemodes/dynamic/dynamic_rulesets_roundstart.dm

@@ -854,7 +854,6 @@
 	flags = HIGH_IMPACT_RULESET
 	minimum_players = 30
 	antag_cap = 3
-	var/datum/team/shadowling/shadowling
 
 /datum/dynamic_ruleset/roundstart/shadowling/ready(population, forced = FALSE)
 	required_candidates = get_antag_cap(population)

code/modules/client/client_defines.dm

@@ -106,9 +106,6 @@
 	///Used for limiting the rate of clicks sends by the client to avoid abuse
 	var/list/clicklimiter
 
-	///goonchat chatoutput of the client
-	var/datum/chatOutput/chatOutput
-
  	///lazy list of all credit object bound to this client
 	//var/list/credits
 

code/modules/mob/dead/observer/observer.dm

@@ -18,7 +18,6 @@ GLOBAL_VAR_INIT(observer_default_invisibility, INVISIBILITY_OBSERVER)
 	hud_type = /datum/hud/ghost
 	movement_type = GROUND | FLYING
 	var/can_reenter_corpse
-	var/datum/hud/living/carbon/hud = null // hud
 	var/bootime = 0
 	var/started_as_observer //This variable is set to 1 when you enter the game as an observer.
 							//If you died in the game and are a ghsot - this will remain as null.

code/modules/mob/living/living_defines.dm

@@ -120,8 +120,6 @@
 
 	var/list/implants = null
 
-	var/datum/riding/riding_datum
-
 	var/last_words	//used for database logging
 
 	var/list/obj/effect/proc_holder/abilities = list()

code/modules/mob/living/simple_animal/hostile/jungle/seedling.dm

@@ -31,7 +31,6 @@
 	stat_attack = UNCONSCIOUS
 	move_resist = MOVE_FORCE_EXTREMELY_STRONG
 	var/combatant_state = SEEDLING_STATE_NEUTRAL
-	var/obj/seedling_weakpoint/weak_point
 	var/mob/living/beam_debuff_target
 	var/solar_beam_identifier = 0