DB: fixed some startup errors

sql/updates/world/custom/custom_2019_02_15_01_world.sql

@@ -0,0 +1,3 @@
+UPDATE `creature_template` SET `flags_extra`= 1073741824 WHERE `entry` IN (52613, 52601, 52614, 52607, 52957, 52959, 52963);
+UPDATE `creature_template` SET `lootid`= 0 WHERE `entry` IN (52973, 52969, 52961, 52971, 52975);
+DELETE FROM `spell_group` WHERE `spell_id` IN (30808, 53138, 58180);