web-transport-quinn: ServerBuilder::congestion_controller is not being used

[teohhanhui]

Not sure why clippy is not catching this?

[kixelated]

Not sure why clippy is not catching this?

Might be an older version in CI. I have a PR that uses Nix so it'll be pinned, just need to update it.

[teohhanhui]

Might be an older version in CI.

That's not it. We're using the stable Rust toolchain in CI.

Not sure why dead_code doesn't catch this... Maybe I'm missing something.