Core/Spells: Removed SpellEffIndex effIndex argument from spell effect handlers, it was commented out in almost every handler

Port From (https://github.com/TrinityCore/TrinityCore/commit/3dd75a49b190098010803014072c0c8bee2996bd)

Source/Game/Scripting/SpellScript.cs

@@ -821,7 +821,7 @@ namespace Game.Scripting
         public Item GetCastItem() { return m_spell.m_CastItem; }
 
         // Creates item. Calls Spell.DoCreateItem method.
-        public void CreateItem(uint effIndex, uint itemId, ItemContext context) { m_spell.DoCreateItem(effIndex, itemId, context); }
+        public void CreateItem(uint itemId, ItemContext context) { m_spell.DoCreateItem(itemId, context); }
 
         // Returns SpellInfo from the spell that triggered the current one
         public SpellInfo GetTriggeringSpell() { return m_spell.m_triggeredByAuraSpell; }