Remove duplicate registration of UiTopoLayoutId in UiTopoLayoutManager.

This is already registered in the API namespace.

Change-Id: I4d084005808c98edfa32422ccd22e9a87406f137
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoLayoutManager.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoLayoutManager.java
index 9f92383..5e6927f 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoLayoutManager.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoLayoutManager.java
@@ -69,7 +69,6 @@
     public void activate() {
         KryoNamespace.Builder kryoBuilder = new KryoNamespace.Builder()
                 .register(KryoNamespaces.API)
-                .register(UiTopoLayoutId.class)
                 .register(UiTopoLayout.class);
 
         layouts = storageService.<UiTopoLayoutId, UiTopoLayout>consistentMapBuilder()