[8416] Fixed problem with double cast form passives at loading. Author: VladimirMangos

* Drop learning form passives at form psell learning, and cast it explictly from code in all cases.
    * Drop cast form passives at learning.
    * Note: talents that have dependent form time passives still work in original way: learned and casted at learn if need.
    * Drop hack for spell 24907 casting at form apply: it casted fines as result normal triggered effect in related form spell.

    Original patch provided by nos4r2zod.

--HG--
branch : trunk

src/game/SpellAuras.cpp

@@ -1936,8 +1936,6 @@ void AuraEffect::HandleShapeshiftBoosts(bool apply)
             break;
         case FORM_MOONKIN:
             spellId = 24905;
-            // aura from effect trigger spell
-            spellId2 = 24907;
             break;
         case FORM_FLIGHT:
             spellId = 33948;