app/presenters: remove unused forum_post/note/post_version presenters.

app/models/forum_topic.rb

@@ -158,10 +158,6 @@ class ForumTopic < ActiveRecord::Base
     (response_count / Danbooru.config.posts_per_page.to_f).ceil
   end
 
-  def presenter(forum_posts)
-    @presenter ||= ForumTopicPresenter.new(self, forum_posts)
-  end
-
   def as_json(options = {})
     if CurrentUser.user.level < min_level
       options[:only] = [:id]

app/models/note.rb

@@ -89,10 +89,6 @@ class Note < ActiveRecord::Base
   extend SearchMethods
   include ApiMethods
 
-  def presenter
-    @presenter ||= NotePresenter.new(self)
-  end
-
   def initialize_creator
     self.creator_id = CurrentUser.id
   end

app/models/post_version.rb

@@ -56,10 +56,6 @@ class PostVersion < ActiveRecord::Base
     @tag_array ||= tags.scan(/\S+/)
   end
 
-  def presenter
-    PostVersionPresenter.new(self)
-  end
-
   def reload
     @tag_array = nil
     super