securedht: don't complain about certificate announcement

src/securedht.cpp

@@ -76,8 +76,6 @@ SecureDht::SecureDht(int s, int s6, SecureDht::Config conf)
         }, [this](bool ok) {
             if (ok)
                 DHT_LOG.DEBUG("SecureDht: public key announced successfully");
-            else
-                DHT_LOG.ERR("SecureDht: error while announcing public key!");
         }, {}, true);
     }
 }