Remove unused footer links

Close #210

Author: cmaureir

src/config/menu.json

@@ -47,15 +47,7 @@
     },
     {
       "name": "Contact",
-      "url": "/contact"
-    },
-    {
-      "name": "Elements",
-      "url": "/elements"
-    },
-    {
-      "name": "Privacy Policy",
-      "url": "/privacy-policy"
+      "url": "mailto:[email protected]"
     }
   ]
 }