fix: update readme

README.rst

@@ -112,10 +112,10 @@ asset by editing the asset in Superset and selecting "Save As" to save it to a n
 # Note: If you are using custom assets you will need to rebuild your aspects-superset
 # image on your local machine with `tutor images build aspects-superset --no-cache`.
 
-Assets created for Aspects that are no longer used are specified in `aspects_asset_list.yaml`
-and will be deleted from the Superset database during `init` (specifically `import-assets`).
-Unused asset yaml files are deleted during `import_superset_zip` or by running the command
-`tutor aspects delete_unused_assets`.
+Assets (charts/datasets) created for Aspects that are no longer used can be listed in 
+`aspects_asset_list.yaml`. These assets & any translated assets created from them, 
+are deleted from Superset during `init` (specifically `import-assets`). The corresponding 
+YAML files are deleted during `import_superset_zip` or and `check_superset_assets`.
 
 Sharing Charts and Dashboards
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^