common: remove DECL_FINAL/OVERRIDE macros; use C++11 keywords directly

Change-Id: I71a148b0df7c95387b2caa8e2b9fe93b03ca2399
Refs: #3599
diff --git a/tests/daemon/mgmt/face-manager.t.cpp b/tests/daemon/mgmt/face-manager.t.cpp
index d3e0b34..851a785 100644
--- a/tests/daemon/mgmt/face-manager.t.cpp
+++ b/tests/daemon/mgmt/face-manager.t.cpp
@@ -335,12 +335,12 @@
   createFace(const FaceUri& uri,
              ndn::nfd::FacePersistency persistency,
              const FaceCreatedCallback& onCreated,
-             const FaceCreationFailedCallback& onConnectFailed) DECL_OVERRIDE
+             const FaceCreationFailedCallback& onConnectFailed) override
   {
   }
 
   virtual std::vector<shared_ptr<const Channel>>
-  getChannels() const DECL_OVERRIDE
+  getChannels() const override
   {
     return m_channels;
   }