Update translation files

Updated by "Cleanup translation files" hook in Weblate.

Translation: Mobilizon/Frontend
Translate-URL: https://weblate.framasoft.org/projects/mobilizon/frontend/

js/src/i18n/fa.json

@@ -962,7 +962,6 @@
   "Underline": "",
   "Undo": "",
   "Unfollow": "",
-  "Unfortunately, this instance isn't opened to registrations": "",
   "Unfortunately, your participation request was rejected by the organizers.": "",
   "Unknown": "",
   "Unknown actor": "",