Revert "Materials And Stack Harddel" (#22364)

Reverts Aurorastation/Aurora.3#22313

Somehow made a race condition that causes the protolathe to delete
stacks if and only if the stack would have been "finished" by fully
placing the stack in the protolathe.

code/game/objects/items/stacks/stack.dm

@@ -62,10 +62,6 @@
 	if (src && usr && usr.machine == src)
 		usr << browse(null, "window=stack")
 		usr.unset_machine()
-
-	recipes = null
-	build_type = null
-	synths = null
 	return ..()
 
 /obj/item/stack/update_icon()