Address issues in 50950d9533 #1340

- Add changelog entry
- Remove superseded and incorrect tests
- Fix array serialization test

test/serializers/meta_test.rb

@@ -3,8 +3,6 @@ require 'test_helper'
 module ActiveModel
   class Serializer
     class MetaTest < ActiveSupport::TestCase
-      MetaBlogSerializer = Class.new(ActiveModel::Serializer)
-
       def setup
         @blog = Blog.new(id: 1,
                          name: 'AMS Hints',
@@ -127,20 +125,6 @@ module ActiveModel
         }
         assert_equal(expected, actual)
       end
-
-      def test_meta_is_set_with_direct_attributes
-        MetaBlogSerializer.meta stuff: 'value'
-        blog_meta_serializer = MetaBlogSerializer.new(@blog)
-        assert_equal(blog_meta_serializer.meta, stuff: 'value')
-      end
-
-      def test_meta_is_set_with_block
-        MetaBlogSerializer.meta do
-          { articles_count: object.articles.count }
-        end
-        blog_meta_serializer = MetaBlogSerializer.new(@blog)
-        assert_equal(blog_meta_serializer.meta, articles_count: @blog.articles.count)
-      end
     end
   end
 end