Update content.json

public/content/content.json

@@ -613,9 +613,9 @@
       "description_de": "This project demonstrates a simple way to display possible modification of a physical 3D city model using mobile AR."
     },
     "links": {
-      "youtube": "https://vimeo.com/221005614", //(YouTubebutton)
+      "youtube": "https://vimeo.com/221005614",
       "demo": "",
-      "publication":"https://www.researchgate.net/publication/323884224_Object-Based_Mobile_Augmented_Reality_for_a_3D_Model", //(Publication button)
+      "publication":"https://www.researchgate.net/publication/323884224_Object-Based_Mobile_Augmented_Reality_for_a_3D_Model",
       "project":"", 
       "presentation":""
     }
@@ -640,8 +640,8 @@
     "links": {
       "youtube": "",
       "demo": "",
-      "publication":"http://dx.doi.org/10.5194/isprs-annals-IV-4-W7-129-2018", //(Publication button)
-      "project":"https://www.hft-stuttgart.de/forschung/projekte/abgeschlossen/ensign", //(Project button)
+      "publication":"http://dx.doi.org/10.5194/isprs-annals-IV-4-W7-129-2018",
+      "project":"https://www.hft-stuttgart.de/forschung/projekte/abgeschlossen/ensign",
       "presentation":""
     }
 }