Update translation files

Updated by "Remove blank strings" hook in Weblate.

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

server/i18n/en-AU.json

@@ -10420,10 +10420,6 @@
     "id": "app.custom_profile_attributes.count_property_fields.app_error",
     "translation": "Unable to count the number of fields for the custom profile attribute group"
   },
-  {
-    "id": "app.custom_profile_attributes.property_value_upsert.app_error",
-    "translation": ""
-  },
   {
     "id": "model.config.is_valid.metrics_client_side_user_id.app_error",
     "translation": "Invalid client side user ID: {{.Id}}"