Removing deprecated annotation

Change-Id: I8fda28b0a5c86ff41a7005f38d128d6c578146f4
diff --git a/core/api/src/main/java/org/onosproject/event/AbstractListenerManager.java b/core/api/src/main/java/org/onosproject/event/AbstractListenerManager.java
index 2cb3bbe..e8c7f2e 100644
--- a/core/api/src/main/java/org/onosproject/event/AbstractListenerManager.java
+++ b/core/api/src/main/java/org/onosproject/event/AbstractListenerManager.java
@@ -22,7 +22,7 @@
 /**
  * Basis for components which need to export listener mechanism.
  */
-@Component(componentAbstract = true)
+@Component
 public abstract class AbstractListenerManager<E extends Event, L extends EventListener<E>>
     implements ListenerService<E, L> {