conf.js.sample: Comment the autoload and the menu

As we don't provide those Vidjil files (maybe we should?), comment the
corresponding configuration as it will (nicely) fail to load the files.

This is now provided as an example

browser/js/conf.js.sample

@@ -27,6 +27,7 @@ var config = {
      */
 
     /* 2) Menu with a list of static files */
+    /*
     "file_menu" : {
         "path" : "/browser/data/",
         "file" : [
@@ -34,9 +35,10 @@ var config = {
             "L2-LIL-2.vidjil"
         ]
     },
+    */
     
     /* 3) Static file autoload, possibly with an .analysis file */
-    "autoload" : "data/Stanford-S22.vidjil",
+    // "autoload" : "data/Stanford-S22.vidjil",
     // "autoload_analysis" : "data/Stanford-S22.analysis"
 
     // Proxy config for IMGT querying