models: include all int/bool columns as html data attributes by default.

app/models/forum_topic.rb

@@ -131,17 +131,10 @@ class ForumTopic < ApplicationRecord
     end
   end
 
-  module ApiMethods
-    def html_data_attributes
-      [:creator_id, :updater_id, :category_id]
-    end
-  end
-
   extend SearchMethods
   include CategoryMethods
   include VisitMethods
   include SubscriptionMethods
-  include ApiMethods
 
   def editable_by?(user)
     (creator_id == user.id || user.is_moderator?) && visible?(user)