removed /m/ codepath, added mobile override stylesheet

config/routes.rb

@@ -163,11 +163,6 @@ Danbooru::Application.routes.draw do
   end
   resources :wiki_page_versions, :only => [:index, :show]
 
-  namespace :m do
-    resources :posts
-    resource :session
-  end
-
   # aliases
   resources :wpages, :controller => "wiki_pages"
   resources :ftopics, :controller => "forum_topics"