Cleans up other components destroys (#38930)

* wearertargeting destroy

* Why did these variables even existed.

* ....

code/datums/components/uplink.dm

@@ -70,6 +70,7 @@ GLOBAL_LIST_EMPTY(uplinks)
 /datum/component/uplink/Destroy()
 	GLOB.uplinks -= src
 	gamemode = null
+	purchase_log = null
 	return ..()
 
 /datum/component/uplink/proc/LoadTC(mob/user, obj/item/stack/telecrystal/TC, silent = FALSE)

code/datums/components/wearertargeting.dm

@@ -20,3 +20,7 @@
 
 /datum/component/wearertargeting/proc/on_drop(mob/user)
 	UnregisterSignal(user, signals)
+
+/datum/component/wearertargeting/Destroy()
+	QDEL_NULL(callback) //is likely to ourselves.
+	return ..()

code/modules/uplink/uplink_purchase_log.dm

@@ -3,12 +3,10 @@ GLOBAL_LIST(uplink_purchase_logs_by_key)	//assoc key = /datum/uplink_purchase_lo
 /datum/uplink_purchase_log
 	var/owner
 	var/list/purchase_log				//assoc path-of-item = /datum/uplink_purchase_entry
-	var/datum/component/uplink/parent
 	var/total_spent = 0
 
 /datum/uplink_purchase_log/New(_owner, datum/component/uplink/_parent)
 	owner = _owner
-	parent = _parent
 	LAZYINITLIST(GLOB.uplink_purchase_logs_by_key)
 	if(owner)
 		if(GLOB.uplink_purchase_logs_by_key[owner])
@@ -19,7 +17,6 @@ GLOBAL_LIST(uplink_purchase_logs_by_key)	//assoc key = /datum/uplink_purchase_lo
 
 /datum/uplink_purchase_log/Destroy()
 	purchase_log = null
-	parent = null
 	if(GLOB.uplink_purchase_logs_by_key[owner] == src)
 		GLOB.uplink_purchase_logs_by_key -= owner
 	return ..()