item_updater : Implementing Object.Delete for version

Change-Id: If962dec1da2d2fe925374bb37f89ed23f04c5ab6
Signed-off-by: Leonel Gonzalez <lgonzalez@us.ibm.com>
diff --git a/activation.cpp b/activation.cpp
index 3d70811..b63853d 100755
--- a/activation.cpp
+++ b/activation.cpp
@@ -266,6 +266,11 @@
     return;
 }
 
+void Activation::delete_()
+{
+    parent.erase(versionId);
+}
+
 } // namespace updater
 } // namespace software
 } // namespace openpower