sniff: add conditional compilation directives for downloaded_lines

as we ignore --progressbar option in qsvdp variant and downloaded_lines, which is used in progressbar messages, is not needed

src/cmd/sniff.rs

@@ -424,6 +424,7 @@ async fn get_file_to_sniff(args: &Args, tmpdir: &tempfile::TempDir) -> CliResult
  let mut file = NamedTempFile::new()?;
  let mut downloaded = 0_usize;
  let mut stream = res.bytes_stream();
+ #[cfg(any(feature = "feature_capable", feature = "lite"))]
  let mut downloaded_lines = 0_usize;
  #[allow(unused_assignments)]
  let mut chunk = Bytes::new(); // amortize the allocation
@@ -454,6 +455,7 @@ async fn get_file_to_sniff(args: &Args, tmpdir: &tempfile::TempDir) -> CliResult
  }
 
  // check if we're downloading the entire file
+ #[cfg(any(feature = "feature_capable", feature = "lite"))]
  if lines_sample_size != usize::MAX {
  // we're not downloading the entire file, so we need to
  // scan chunk for newlines