DB/Gossip: remove wrong gossip text from Hemet Nesingwary (Nagrand).

This needs some more research. Apparently it should show only for people that completed this quest before TBC came out.

sql/updates/world/3.3.5/2016_10_30_00_world.sql

@@ -0,0 +1,3 @@
+--
+DELETE FROM `conditions` WHERE `SourceTypeOrReferenceId`=14 AND `SourceGroup`=7579 AND `SourceEntry`=9221;
+DELETE FROM `gossip_menu` WHERE `entry`=7579 AND `text_id`=9221;