Removing useless func IsAlive, since it's handled by ISetAllocated

mesosphere/include/mesosphere/interrupts/KInterruptEvent.hpp

@@ -16,13 +16,9 @@ class KInterruptEvent final : public KReadableEvent, public ISetAllocated<KInter
     virtual ~KInterruptEvent();
     Result Initialize(int irqId, u32 flags);
 
-    // KAutoObject
-    virtual bool IsAlive() const override;
-
     private:
     // TODO: receiver
     int irqId = -1;
-    bool isInitialized = false;
 };
 
 inline void intrusive_ptr_add_ref(KInterruptEvent *obj)