Remove specific Web UI authentication chain

In the context of NXP-25774 a specific authentication chain was introduced in Web UI to make Token auth stateful so we could fetch other protected resources with cookie based auth.

Still, given that token authenticator leverages a custom "X-Authentication-Token" we should not need to make the token authenticator stateful and having this specific auth chain for Web UI means we need to override this one on top of the default auth chain whenever we want to make changes to it.