Removed:

• script_info is no longer passed as the first arg / matching kwarg to an app factory function. It is no longer passed as the first arg to many internal CLI functions.
• config.from_json, useconfig.from_file(path, json.load) instead.
• json functions no longer take anencoding parameter.
• safe_join, usewerkzeug.utils.safe_join instead.
• total_seconds, usetimedelta.total_seconds instead.
• The same blueprint can't be registered with the same name, every registration requires a unique, possibly nested, name.

Some parameters tosend_file andsend_from_directory were renamed to be more accurate to what they did when moving the implementations to Werkzeug. These old names were deprecated in Flask's wrappers. The deprecation period has been extended to 2.2.attachment_filename is renamed todownload_name,cache_timeout is renamed tomax_age,add_etags is renamed toetag, andfilename is renamed topath.