Add KInterruptEvent skeleton; remove useless funcs

mesosphere/source/interrupts/KInterruptEvent.cpp

@@ -0,0 +1,25 @@
+#include <mesosphere/interrupts/KInterruptEvent.hpp>
+
+namespace mesosphere
+{
+
+KInterruptEvent::~KInterruptEvent()
+{
+    // delete receiver? 
+}
+
+Result KInterruptEvent::Initialize(int irqId, u32 flags)
+{
+    // TODO implement
+    (void)flags;
+    this->irqId = irqId;
+    isInitialized = true;
+    return ResultSuccess();
+}
+
+bool KInterruptEvent::IsAlive() const
+{
+    return isInitialized;
+}
+
+}