Comment out Norwegian nautical charts layer.

It has apparently become inaccessible in recent times.

lib/www/client/source/src/views/Map.vue

@@ -685,6 +685,7 @@ export default {
       })
     }
 
+    /*
     this.layersAvailable.nau = (options = {}) => {
       return new TileLayer({
         id: "nau",
@@ -709,6 +710,7 @@ export default {
         ...options
       })
     }
+    */
 
     /*
     this.layersAvailable.nav = (options = {}) => {