Remove obsolete translation files for nodac

There were folders for Portugese, Polish  and Italian translations,
which were never done

nodac/en/languser.json

@@ -16,6 +16,7 @@
         "preferred_language": "Preferred language",
         "admin": "Admin",
         "groupadmin": "Group admin",
-        "editor": "Editor"
+        "editor": "Editor",
+        "switch_language": "Switch language"
     }
 }