Remove unused messages (#5924)

app/javascript/mastodon/locales/fa.json

@@ -255,9 +255,5 @@
   "video.mute": "قطع صدا",
   "video.pause": "توقف",
   "video.play": "پخش",
-  "video.unmute": "پخش صدا",
-  "video_player.expand": "Expand video",
-  "video_player.toggle_sound": "Toggle sound",
-  "video_player.toggle_visible": "Toggle visibility",
-  "video_player.video_error": "Video could not be played"
+  "video.unmute": "پخش صدا"
 }