Fix (DB\Loot) Zora Loot fix (#10002)

Remove Broken Silithid Chitin from npc. NPC Never dropped it. Compared to UDB for verification.

data/sql/updates/pending_db_world/rev_1641302977270881641.sql

@@ -0,0 +1,4 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1641302977270881641');
+
+-- Removes improper loot Broken Silithid Chitin from Silithus Rare Zora
+DELETE FROM `creature_loot_template` WHERE  `Entry`=14474 AND `Item`=20499 AND `Reference`=0 AND `GroupId`=0;