Remove the emitting of the remove lifecycle event

There's nothing listening to these events. We can add it back in when
there is need for it, but at the moment it's just dead code.

Author: ankur22

common/event_emitter.go

@@ -24,9 +24,8 @@ const (
 
 	// Frame
 
-	EventFrameNavigation      string = "navigation"
-	EventFrameAddLifecycle    string = "addlifecycle"
-	EventFrameRemoveLifecycle string = "removelifecycle"
+	EventFrameNavigation   string = "navigation"
+	EventFrameAddLifecycle string = "addlifecycle"
 
 	// Page
 

common/frame.go

@@ -238,17 +238,6 @@ func (f *Frame) recalculateLifecycle() {
 		}
 	}
 
-	// Emit removal events
-	f.lifecycleEventsMu.RLock()
-	{
-		for k := range f.subtreeLifecycleEvents {
-			if ok := events[k]; !ok {
-				f.emit(EventFrameRemoveLifecycle, k)
-			}
-		}
-	}
-	f.lifecycleEventsMu.RUnlock()
-
 	f.lifecycleEventsMu.Lock()
 	{
 		f.subtreeLifecycleEvents = make(map[LifecycleEvent]bool)