security: enable fetching cert list from ndncert.named-data.net

Change-Id: I520b58932ede2417f36fe68bd429a95b1553c13b
diff --git a/src/contact-manager.cpp b/src/contact-manager.cpp
index 74f84fa..4b50ef4 100644
--- a/src/contact-manager.cpp
+++ b/src/contact-manager.cpp
@@ -733,8 +733,6 @@
 void
 ContactManager::onRefreshBrowseContact()
 {
-  return; // the website info is not available.
-
   std::vector<std::string> bufferedIdCertNames;
   try
     {