Core/Spells: Drop dead code and fix some SQL updates

sql/updates/world/2011_05_30_04_world_creature_template_addon.sql

@@ -1 +1,2 @@
+DELETE FROM `creature_template_addon` WHERE `entry` = 15224;
 INSERT INTO `creature_template_addon` (`entry`,`auras`) VALUES (15224, '24777');

sql/updates/world/2011_05_31_00_world_spell_script_names.sql

@@ -1 +1,2 @@
-INSERT INTO `spell_script_names`(`spell_id`, `ScriptName`) VALUES ('24778', 'spell_dream_fog_sleep');
+DELETE FROM `spell_script_names` WHERE `spell_id` = 24778;
+INSERT INTO `spell_script_names` (`spell_id`,`ScriptName`) VALUES (24778, 'spell_dream_fog_sleep');

src/server/game/Spells/Auras/SpellAuras.cpp

@@ -1401,14 +1401,6 @@ void Aura::HandleAuraSpecificMods(AuraApplication const * aurApp, Unit * caster,
                      // aura removed - remove death runes
                     target->ToPlayer()->RemoveRunesByAuraEffect(GetEffect(0));
                 }
-                switch(GetId())
-                {
-                    case 50514: // Summon Gargoyle
-                        if (removeMode != AURA_REMOVE_BY_EXPIRE)
-                            break;
-                        target->CastSpell(target, GetEffect(0)->GetAmount(), true, NULL, GetEffect(0));
-                        break;
-                }
                 break;
             case SPELLFAMILY_HUNTER:
                 // Glyph of Freezing Trap