Updated translation. (#1596)

translations/fr-fr.all.json

@@ -1355,10 +1355,6 @@
     "id": "torrent_language",
     "translation": "Langue du torrent"
   },
-  {
-    "id": "language_not_mandatory",
-    "translation": "La langue du torrent n'est pas obligatoire."
-  },
   {
     "id": "language_en-us_name",
     "translation": "Anglais"