[COMMITTERS] pgsql: Remove deprecated COMMENT ON RULE syntax

Remove deprecated COMMENT ON RULE syntax

This was only used for allowing upgrades from pre-7.3 instances, which
was a long time ago.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/e8d016d81940e75c126aa52971b7903b7301002e

Modified Files
--------------
src/backend/catalog/objectaddress.c                | 126 ++++++++-------------
src/backend/parser/gram.y                          |  10 --
src/backend/rewrite/rewriteSupport.c               |  55 ---------
src/include/rewrite/rewriteSupport.h               |   2 -
.../test_ddl_deparse/expected/comment_on.out       |   2 +-
.../modules/test_ddl_deparse/sql/comment_on.sql    |   2 +-
src/test/regress/expected/object_address.out       |   4 +-
7 files changed, 53 insertions(+), 148 deletions(-)