# File lib/rack/response.rb, line 84
    def delete_cookie(key, value={})
      unless Array === self["Set-Cookie"]
        self["Set-Cookie"] = [self["Set-Cookie"]].compact
      end

      self["Set-Cookie"].reject! { |cookie|
        cookie =~ /\A#{Utils.escape(key)}=/
      }

      set_cookie(key,
                 {:value => '', :path => nil, :domain => nil,
                   :expires => Time.at(0) }.merge(value))
    end