Remove Frost Nova autoremoval hack. (#128)

-This may affect other spells too.

src/game/WorldHandlers/SpellAuras.cpp

@@ -628,6 +628,10 @@ bool Aura::isAffectedOnSpell(SpellEntry const* spell) const
 
 bool Aura::CanProcFrom(SpellEntry const* spell, uint32 EventProcEx, uint32 procEx, bool active, bool useClassMask) const
 {
+    // Aura cannot proc from itself unless it's periodic
+    if (GetId() == spell->Id && !IsPeriodic())
+      { return false; }
+
     // Check EffectClassMask (in pre-3.x stored in spell_affect in fact)
     ClassFamilyMask mask = sSpellMgr.GetSpellAffectMask(GetId(), GetEffIndex());
 

src/game/WorldHandlers/UnitAuraProcHandler.cpp

@@ -237,11 +237,6 @@ bool Unit::IsTriggeredAtSpellProcEvent(Unit* pVictim, SpellAuraHolder* holder, S
 {
     SpellEntry const* spellProto = holder->GetSpellProto();
 
-    // early check to prevent FrostNova damage to remove Aura 26
-    if (procSpell && (procSpell->Id == spellProto->Id) && (spellProto->SpellIconID == 193) &&
-        (spellProto->SpellVisual == 17) && (spellProto->SpellFamilyName == SPELLFAMILY_MAGE))
-        return false;
-
     // Get proc Event Entry
     spellProcEvent = sSpellMgr.GetSpellProcEvent(spellProto->Id);