diff --git a/stdlib/open-uri/0/open-uri.rbs b/stdlib/open-uri/0/open-uri.rbs
index d044b8dc9..7b6649c08 100644
--- a/stdlib/open-uri/0/open-uri.rbs
+++ b/stdlib/open-uri/0/open-uri.rbs
@@ -334,14 +334,6 @@ module URI
     include OpenURI::OpenRead
   end
 
-  # <!-- rdoc-file=lib/uri/ftp.rb -->
-  # FTP URI syntax is defined by RFC1738 section 3.2.
-  #
-  # This class will be redesigned because of difference of implementations; the
-  # structure of its path. draft-hoffman-ftp-uri-04 is a draft but it is a good
-  # summary about the de facto spec.
-  # http://tools.ietf.org/html/draft-hoffman-ftp-uri-04
-  #
   %a{annotate:rdoc:skip}
   class FTP
     include OpenURI::OpenRead