related tags: eliminate recent_tags cookie (#3955).

app/controllers/posts_controller.rb

@@ -46,7 +46,6 @@ class PostsController < ApplicationController
     @post = Post.find(params[:id])
 
     @post.update(post_params) if @post.visible?
-    save_recent_tags
     respond_with_post_after_update(@post)
   end
 
@@ -96,15 +95,6 @@ private
     params[:tags] || (params[:post] && params[:post][:tags])
   end
 
-  def save_recent_tags
-    if @post
-      tags = Tag.scan_tags(@post.tag_string)
-      tags = (TagAlias.to_aliased(tags) + Tag.scan_tags(cookies[:recent_tags])).uniq.slice(0, 30)
-      cookies[:recent_tags] = tags.join(" ")
-      cookies[:recent_tags_with_categories] = Tag.categories_for(tags).to_a.flatten.join(" ")
-    end
-  end
-
   def respond_with_post_after_update(post)
     respond_with(post) do |format|
       format.html do