Hide the option to sync ingredients and images from OFF

This doesn't remove the option, but makes it more difficult for local
instances to hammer the OFF servers.

See also wger-project/wger#1870

Author: rolandgeider

config/prod.env

@@ -64,12 +64,10 @@ SYNC_INGREDIENTS_CELERY=True
 # - Manually trigger the process as needed:
 #   docker compose exec web python3 manage.py sync-ingredients
 
-# When scanning products with the barcode scanner, it is possible to dynamically
-# fetch the ingredient if it is not known in the local database. This option controlls
-# where to try to download the ingredient and their images.
-# Possible values OFF, WGER or None. Note that it is recommended to keep this as WGER
-# so that we don't overwhelm the Open Food Facts servers. Needs to have USE_CELERY
-# set to true
+# This option controls whether to download ingredients and their images from the
+# configured wger instance. When scanning products with the barcode scanner, it is
+# possible to dynamically fetch the ingredient if it is not known in the local database.
+# Possible values: WGER or None. Requires USE_CELERY to be set to true.
 DOWNLOAD_INGREDIENTS_FROM=WGER
 
 # Whether celery is configured and should be used. Can be left to true with