Removed annoate and hirb Gemfiles.

Annotate: Better look in schema.rb, this reference should be always up
to date.

Hirb: To reactivate hirb, look in railscasts:
http://railscasts.com/episodes/48-console-tricks-revised

test/fixtures/article_categories.yml

@@ -7,12 +7,3 @@ vegi:
 other:
   name: Other stuff
 
-# == Schema Information
-#
-# Table name: article_categories
-#
-#  id          :integer(4)      not null, primary key
-#  name        :string(255)     default(""), not null
-#  description :string(255)
-#
-