doc: drop "test" route

This looks like debugging cruft added in 97bc298 (implement
ref version dropdown, 2012-04-17), and hasn't been kept up
to date (it tries to show the rebase page but doesn't
actually work).

This isn't a huge deal, but requesting `/test.zip` (which
some spam scripts do) results in an exception.

app/controllers/doc_controller.rb

@@ -12,10 +12,6 @@ class DocController < ApplicationController
   def ref
   end
 
-  def test
-    render 'doc/rebase'
-  end
-
   def man
     return redirect_to docs_path unless @doc_file
     unless @doc_version.respond_to?(:version)

config/routes.rb

@@ -24,7 +24,6 @@ Gitscm::Application.routes.draw do
   get "/docs/:file.html" => "doc#man", :as => :doc_file_html, :file => /[\w\-\.]+/
   get "/docs/:file" => "doc#man", :as => :doc_file, :file => /[\w\-\.]+/
   get "/docs/:file/:version" => "doc#man", :version => /[^\/]+/
-  get "/test" => "doc#test"
   get "/doc/ext" => "doc#ext"
 
   %w{man ref git}.each do |path|