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 ..()