Remove leftover from spike

lib/vagrant-lxc/container.rb

@@ -15,7 +15,7 @@ module Vagrant
       include Vagrant::Util::Retryable
 
       # This is raised if the container can't be found when initializing it with
-      # an UUID.
+      # a name.
       class NotFound < StandardError; end
 
       CONTAINERS_PATH = '/var/lib/lxc'
@@ -103,10 +103,6 @@ module Vagrant
         execute('sudo', "lxc-#{command}", *args)
       end
 
-      def update!(state)
-        File.open(state_file_path, 'w') { |f| f.print state }
-      end
-
       def state
         if @name && lxc(:info, '--name', @name) =~ /^state:[^A-Z]+([A-Z]+)$/
           $1.downcase.to_sym