data: setName method is no longer virtual

Change-Id: I89622a972facdfaab239ac2e0ed975c225f542d4
diff --git a/include/ndn-cpp/data.hpp b/include/ndn-cpp/data.hpp
index 4bda816..3f0d00b 100644
--- a/include/ndn-cpp/data.hpp
+++ b/include/ndn-cpp/data.hpp
@@ -61,12 +61,10 @@
   /**
    * @brief Set name to a copy of the given Name.
    *
-   * This is virtual so that a subclass can override to validate the name.
-   *
    * @param name The Name which is copied.
    * @return This Data so that you can chain calls to update values.
    */
-  inline virtual void
+  inline void
   setName(const Name& name);
 
   inline const MetaInfo&