Removed Deprecated tag on necessary constructor

Change-Id: Ia4791d6880e3b4a20b4ecdcc10b2ba6555846f39
diff --git a/core/store/dist/src/main/java/org/onosproject/store/impl/Timestamped.java b/core/store/dist/src/main/java/org/onosproject/store/impl/Timestamped.java
index ae7267b..4f4086e 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/impl/Timestamped.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/impl/Timestamped.java
@@ -107,11 +107,9 @@
                     .toString();
     }
 
-    // Default constructor for serialization
     /**
-     * @deprecated in Cardinal Release
+     * Constructs an empty object. Required for serialization.
      */
-    @Deprecated
     private Timestamped() {
         this.value = null;
         this.timestamp = null;