That would be crazy. But I can't see where the article says that, nor can I see it said in the opinion piece by the chairman of the Swedish reserve bank which the article links.
The chairman of the Swedish reserve bank makes two suggestions:
1. Modify the RIX system of settlements in the reserve bank. One suggested modification is to extend its operating hours, currently it closes at 17:00 each day. I don't think anyone would consider that a radical proposal.
2. Force banks to handle cash, i.e. if you want to be a bank, then you have to let people withdraw and deposit cash at your branches.
This second point sounds almost bizarre, a bit like demanding that you can't be a restaurant if you don't serve food. But the current situation is that the major banks in Sweden have rapidly reduced the number of branches that handle cash. Swedbank, one of the big four, has roughly 100 branches in Stockholm, the capital, but only two of them handle cash.
You can deposit small amounts of cash in ATMs, about $1000. Anything beyond that and you have to make a trip to one of the two branches that still handles cash.