docs(universal): remove nav link (#3549)

Author: filipesilva

public/docs/ts/latest/guide/_data.json

@@ -200,10 +200,5 @@
   "webpack": {
     "title": "Webpack: an introduction",
     "intro": "Create Angular applications with a Webpack based tooling."
-  },
-
-  "universal": {
-    "title": "Angular Universal",
-    "intro": "How to use Angular Universal."
   }
 }