Can't remove authentication from a client

[chaen]

If you select Client secret over HTTP basic authentication and save on a client, the basic auth works fine.
But then, if I tick the No authentication bullet again, the basic auth is still required.
How do I get rid of that ?
Thanks

[rmiccoli]

Which type of authorization flow are you using?

[chrisburr]

Authentication code with PKCE

[federicaagostini]

PR #676