pgsql: Remove incorrect warning from pg_archivecleanup document.

Remove incorrect warning from pg_archivecleanup document.

The .backup file name can be passed to pg_archivecleanup even if
it includes the extension which is specified in -x option.
However, previously the document incorrectly warned a user
not to do that.

Back-patch to 9.2 where pg_archivecleanup's -x option and
the warning were added.

Branch
------
REL9_5_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/a830c83c9b71b78c65c5ddd71db2ecd68601ce73

Modified Files
--------------
doc/src/sgml/ref/pgarchivecleanup.sgml |    5 -----
1 file changed, 5 deletions(-)