/favorites: replace favorites view with ordfav: search.

Make /favorites redirect to a ordfav:<user> search instead of having a
separate view just for favorites. This duplicated a lot of code for no
good reason.

app/logical/post_sets/favorite.rb

@@ -1,35 +0,0 @@
-module PostSets
-  class Favorite < PostSets::Base
-    attr_reader :user, :page, :favorites, :params
-
-    def initialize(user_id, page = 1, params = {})
-      @params = params
-      @user = ::User.find(user_id)
-      @favorites = ::Favorite.for_user(user.id).paginate(page, :limit => limit).order("favorites.id desc")
-    end
-
-    def limit
-      params[:limit] || CurrentUser.user.per_page
-    end
-
-    def tag_array
-      @tag_array ||= ["fav:#{user.name}"]
-    end
-
-    def tag_string
-      tag_array.uniq.join(" ")
-    end
-
-    def humanized_tag_string
-      "fav:#{user.pretty_name}"
-    end
-
-    def posts
-      @posts ||= favorites.includes(:post).map(&:post).compact
-    end
-
-    def presenter
-      @presenter ||= ::PostSetPresenters::Favorite.new(self)
-    end
-  end
-end