Remove deprecated serialized_attributes

Author: rafaelfranca

activerecord/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Remove deprecated `serialized_attributes`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated automatic counter caches on `has_many :through`.
 
     *Rafael Mendonça França*

activerecord/lib/active_record/attribute_methods/serialization.rb

@@ -51,19 +51,6 @@ def serialize(attr_name, class_name_or_coder = Object)
             Type::Serialized.new(type, coder)
           end
         end
-
-        def serialized_attributes
-          ActiveSupport::Deprecation.warn(<<-MSG.squish)
-            `serialized_attributes` is deprecated without replacement, and will
-            be removed in Rails 5.0.
-          MSG
-
-          @serialized_attributes ||= Hash[
-            columns.select { |t| t.cast_type.is_a?(Type::Serialized) }.map { |c|
-              [c.name, c.cast_type.coder]
-            }
-          ]
-        end
       end
     end
   end

activerecord/test/cases/serialized_attribute_test.rb

@@ -22,12 +22,6 @@ def test_serialize_does_not_eagerly_load_columns
     end
   end
 
-  def test_list_of_serialized_attributes
-    assert_deprecated do
-      assert_equal %w(content), Topic.serialized_attributes.keys
-    end
-  end
-
   def test_serialized_attribute
     Topic.serialize("content", MyObject)