Mark fixme as done, after change in YANG tools.

Change-Id: If74b312fcddef520d9ff807b07c19b491d3f4244
diff --git a/apps/yang/src/main/java/org/onosproject/yang/YangRuntimeManager.java b/apps/yang/src/main/java/org/onosproject/yang/YangRuntimeManager.java
index 9c737b5..b1867f6 100644
--- a/apps/yang/src/main/java/org/onosproject/yang/YangRuntimeManager.java
+++ b/apps/yang/src/main/java/org/onosproject/yang/YangRuntimeManager.java
@@ -110,8 +110,6 @@
 
     @Override
     public void registerSerializer(YangSerializer ys) {
-        //FIXME: Allow re-registration of model with additional service end
-        // points.
         serializerRegistry.registerSerializer(ys);
     }