Action DeleteDecks not working when cardsToo is false

[PaulBonnot]

Cf. title.

The action calls the Anki API function decks.rem(), and it looks like the assertion prevents it for deleting the deck : https://github.com/ankitects/anki/blob/main/pylib/anki/decks.py#L137

Maybe I understood it wrong ? If no, the docs should be updated to tell that it is not possible to delete a deck without its cards.

[thiswillbeyourgithub]

Related to #286 and #272

If anyone knows which function to call I would happily fix it :/