[MIRROR] Weakref cleanup (#12704)

Co-authored-by: Will <7099514+Willburd@users.noreply.github.com>
Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/game/objects/effects/anomalies/anomalies_bioscrambler.dm

@@ -20,6 +20,10 @@
 	. = ..()
 	pursuit_target = WEAKREF(find_nearest_target())
 
+/obj/effect/anomaly/bioscrambler/Destroy()
+	. = ..()
+	pursuit_target = null
+
 /obj/effect/anomaly/bioscrambler/anomalyEffect(seconds_per_tick)
 	. = ..()
 	if(stats)

code/game/objects/effects/anomalies/anomaly_stats.dm

@@ -31,6 +31,8 @@
 
 /datum/anomaly_stats/Destroy(force)
 	QDEL_NULL(modifier)
+	attached_anomaly = null
+	attached_harvester = null
 	return ..()
 
 /datum/anomaly_stats/proc/randomize_particle_types()

code/game/objects/effects/client_only_image.dm

@@ -15,6 +15,7 @@
 		var/client/C = CW?.resolve()
 		if(C)
 			C.images -= src
+	clients.Cut()
 
 // Mostly for motion echos, but someone will probably find another use for it... So parent type gets it instead!
 /image/client_only/proc/place_from_root(var/turf/At)

code/game/objects/items.dm

@@ -166,6 +166,7 @@
 
 /obj/item/Destroy()
 	d_stage_overlay = null
+	exploit_for = null
 	if(item_tf_spawn_allowed)
 		GLOB.item_tf_spawnpoints -= src
 	if(ismob(loc))

code/game/objects/items/devices/radio/radio.dm

@@ -114,6 +114,7 @@
 		SSradio.remove_object(src, frequency)
 		for (var/ch_name in channels)
 			SSradio.remove_object(src, GLOB.radiochannels[ch_name])
+	bs_tx_weakref = null
 	return ..()
 
 /obj/item/radio/proc/recalculateChannels()

code/game/objects/items/devices/tvcamera.dm

@@ -24,6 +24,7 @@
 	qdel(radio)
 	camera = null
 	radio = null
+	showing = null
 	. = ..()
 
 /obj/item/tvcamera/examine()