Scripts: Replaced calls to ForcedDespawn with DespawnOrUnsummon (calls appropriate AI hooks in case of temporary summons) and made ForcedDespawn private

src/server/scripts/Spells/spell_quest.cpp

@@ -837,7 +837,7 @@ class spell_q12659_ahunaes_knife : public SpellScriptLoader
                 Player* caster = GetCaster()->ToPlayer();
                 if (Creature* target = GetHitCreature())
                 {
-                    target->ForcedDespawn();
+                    target->DespawnOrUnsummon();
                     caster->KilledMonsterCredit(NPC_SCALPS_KC_BUNNY, 0);
                 }
             }