spec/app/models/actor.rb in mongoid-3.1.7 vs spec/app/models/actor.rb in mongoid-4.0.0.alpha1

@@ -5,10 +5,9 @@
   has_and_belongs_to_many :tags
   embeds_many :things, validate: false, cascade_callbacks: true
   accepts_nested_attributes_for :things, allow_destroy: true
 
   define_model_callbacks :custom
-  observable :custom
 
   def do_something
     run_callbacks(:custom) do
       self.name = "custom"
     end