src: drop 'virtual' from functions marked 'final' or 'override'

Change-Id: Ieb6df864ab82f77b2bee9e83aa0bfa2005715950
Refs: #3857
diff --git a/src/mgmt/nfd/status-dataset.hpp b/src/mgmt/nfd/status-dataset.hpp
index 9eb43d4..09c1e14 100644
--- a/src/mgmt/nfd/status-dataset.hpp
+++ b/src/mgmt/nfd/status-dataset.hpp
@@ -170,7 +170,7 @@
   FaceQueryDataset(const FaceQueryFilter& filter);
 
 private:
-  virtual void
+  void
   addParameters(Name& name) const override;
 
 private: