Remove dead code

app/models/post.rb

@@ -78,11 +78,6 @@ class Post < ActiveRecord::Base
     Digest::SHA1.hexdigest(raw.gsub(/\s+/, ""))
   end
 
-  def reset_cooked
-    @cooked_document = nil
-    self.cooked = nil
-  end
-
   def self.white_listed_image_classes
     @white_listed_image_classes ||= ['avatar', 'favicon', 'thumbnail']
   end

lib/post_revisor.rb

@@ -66,8 +66,6 @@ class PostRevisor
   end
 
   def update_post
-    @post.reset_cooked
-
     @post.raw = @new_raw
     @post.updated_by = @user
     @post.last_editor_id = @user.id