# File lib/homesick/utils.rb, line 115
    def subdir_remove(castle, path)
      subdir_filepath = subdir_file(castle)
      if subdir_filepath.exist?
        lines = IO.readlines(subdir_filepath).delete_if do |line|
          line == "#{path}\n"
        end
        File.open(subdir_filepath, 'w') { |manfile| manfile.puts lines }
      end

      inside castle_dir(castle) do
        git_add subdir_filepath
      end
    end