Doc: remove ancient comment.

There's a very old comment in rules.sgml added back to 2003.  It
expected to a feature coming back but it never happened. So now we can
safely remove the comment. Back-patched to all supported branches.

Discussion: https://postgr.es/m/20190211.191004.219630835457494660.t-ishii%40sraoss.co.jp

diff --git a/doc/src/sgml/rules.sgml b/doc/src/sgml/rules.sgml
index 3372b1ac2b1d79e43037b34070152158bf72647a..4e20664ea1d6e69074ab57ad5c61465a3798f946 100644 (file)
--- a/doc/src/sgml/rules.sgml
+++ b/doc/src/sgml/rules.sgml
@@ -2434,30 +2434,6 @@ Nestloop
     in a command.
 
 
-
-
-
 
     The summary is, rules will only be significantly slower than
     triggers if their actions result in large and badly qualified