unparam lint (#16865)

Automatic Merge

i18n/en.json

@@ -3066,10 +3066,6 @@
     "id": "api.unable_to_read_file_from_backend",
     "translation": "Error reading file from backend"
   },
-  {
-    "id": "api.unable_write_file_response",
-    "translation": "Error downloading support packet file."
-  },
   {
     "id": "api.upgrade_to_enterprise.already-done.app_error",
     "translation": "You have already upgraded to Mattermost Enterprise Edition. Please restart the server to finish the upgrade."