Weakref cleanup (#19382)

* oh god help

* fixes

* oops

* container runtime

---------

Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/datums/browser.dm

@@ -31,6 +31,10 @@
 	if (source)
 		src.source_ref = WEAKREF(source)
 
+/datum/browser/Destroy(force)
+	. = ..()
+	source_ref = null
+
 /datum/browser/proc/user_deleted(datum/source)
 	SIGNAL_HANDLER
 	user = null

code/datums/callback.dm

@@ -55,6 +55,10 @@
 	if(usr)
 		user = WEAKREF(usr)
 
+/datum/callback/Destroy(force)
+	. = ..()
+	user =  null
+
 /world/proc/ImmediateInvokeAsync(thingtocall, proctocall, ...)
 	set waitfor = FALSE
 

code/datums/mind.dm

@@ -71,6 +71,10 @@
 	antag_holder = new
 	..()
 
+/datum/mind/Destroy(force)
+	. = ..()
+	original_character = null
+
 /datum/mind/proc/transfer_to(mob/living/new_character, force = FALSE)
 	if(!istype(new_character))
 		log_world("## DEBUG: transfer_to(): Some idiot has tried to transfer_to() a non mob/living mob. Please inform Carn")