Removing instrumentation_keys in order to fix the payload

See - #2067

Author: yosiat

lib/active_model/array_serializer.rb

@@ -64,10 +64,5 @@ def embedded_in_root_associations
       end
     end
 
-    private
-
-    def instrumentation_keys
-      [:object, :scope, :root, :meta_key, :meta, :each_serializer, :resource_name, :key_format, :context]
-    end
   end
 end

lib/active_model/default_serializer.rb

@@ -21,12 +21,8 @@ def as_json(options={})
         @wrap_in_array ? [hash] : hash
       end
     end
+
     alias serializable_hash as_json
     alias serializable_object as_json
-
-    private
-    def instrumentation_keys
-      [:object, :wrap_in_array]
-    end
   end
 end

lib/active_model/serializable.rb

@@ -52,15 +52,8 @@ def get_namespace
     end
 
     def instrument(action, &block)
-      payload = instrumentation_keys.inject({ serializer: self.class.name }) do |payload, key|
-        payload[:payload] = self.instance_variable_get(:"@#{key}")
-        payload
-      end
+      payload = { serializer: self.class.name }
       ActiveSupport::Notifications.instrument("#{action}.active_model_serializers", payload, &block)
     end
-
-    def instrumentation_keys
-      [:object, :scope, :root, :meta_key, :meta, :wrap_in_array, :only, :except, :key_format]
-    end
   end
 end