DB/Creature: Remove wrong lashtails spawns in Barrens

Closes #19045

sql/updates/world/3.3.5/2017_11_14_14_world_335.sql

@@ -0,0 +1,4 @@
+-- 
+DELETE FROM `creature` WHERE  `guid` IN (40489, 40490, 40491, 40492, 40493, 40494, 40495, 40496) AND `id`=3254;
+DELETE FROM `creature_addon` WHERE  `guid` IN (40489, 40490, 40491, 40492, 40493, 40494, 40495, 40496);
+DELETE FROM `spawn_group` WHERE  `groupID`=2 AND `spawnType`=0 AND `spawnId` IN (40489, 40490, 40491, 40492, 40493, 40494, 40495, 40496);