message: test(http): remove println from a test
diff: @@ -777,7 +777,6 @@ mod tests {
  let mut conn = Conn::<_, http::Chunk, ServerTransaction>::new(io, Default::default());
  conn.state.writing = Writing::Body(Encoder::length(1024 * 1024), None);
  assert!(conn.start_send(Frame::Body { chunk: Some(vec![b'a'; 1024 * 1024].into()) }).unwrap().is_ready());
  - println!("{:#?}", conn);
  assert!(conn.state.writing.is_queued());
  assert!(conn.poll_complete().unwrap().is_ready());
  assert!(!conn.state.writing.is_queued());
  