Update translation files

Updated by "Cleanup translation files" hook in Weblate.

Translation: Mattermost/server
Translate-URL: https://translate.mattermost.com/projects/mattermost/server/

server/i18n/en-AU.json

@@ -10006,10 +10006,6 @@
     "id": "app.limits.get_app_limits.user_count.store_error",
     "translation": "Failed to get user count"
   },
-  {
-    "id": "app.limits.get_server_limits.post_count.store_error",
-    "translation": "Failed to get post count"
-  },
   {
     "id": "app.import.attachment.file_stat.error",
     "translation": "Error reading the file status: '{{.FilePath}}'"