chore(Scripts/ZulAman): Update Akilzon to new register method (#20556)

src/server/scripts/EasternKingdoms/ZulAman/boss_akilzon.cpp

@@ -57,14 +57,9 @@ enum Misc
 
 constexpr auto NPC_SOARING_EAGLE = 24858;
 
-class boss_akilzon : public CreatureScript
+struct boss_akilzon : public BossAI
 {
-public:
+    boss_akilzon(Creature* creature) : BossAI(creature, DATA_AKILZON), _stormCount(0), _isRaining(false) { }
-    boss_akilzon() : CreatureScript("boss_akilzon") { }
-
-    struct boss_akilzonAI : public BossAI
-    {
-        boss_akilzonAI(Creature* creature) : BossAI(creature, DATA_AKILZON) { }
 
     void Reset() override
     {
@@ -264,12 +259,6 @@ public:
     bool   _isRaining;
 };
 
-    CreatureAI* GetAI(Creature* creature) const override
-    {
-        return GetZulAmanAI<boss_akilzonAI>(creature);
-    }
-};
-
 struct npc_akilzon_eagle : public ScriptedAI
 {
     npc_akilzon_eagle(Creature* creature) : ScriptedAI(creature) { }
@@ -364,7 +353,7 @@ class spell_electrial_storm : public AuraScript
 
 void AddSC_boss_akilzon()
 {
-    new boss_akilzon();
+    RegisterZulAmanCreatureAI(boss_akilzon);
     RegisterZulAmanCreatureAI(npc_akilzon_eagle);
     RegisterSpellScript(spell_electrial_storm);
 }