fixup! du: parse blocksize and apparent-size using uutils-args

Author: BenWiederhake

src/uu/du/src/du.rs

@@ -718,7 +718,7 @@ fn read_files_from(file_name: &str) -> Result<Vec<PathBuf>, std::io::Error> {
 #[allow(clippy::cognitive_complexity)]
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let raw_args = args.collect::<Vec<_>>();
-    let (settings, operands) = Settings::default()
+    let (settings, _operands) = Settings::default()
         .parse(&raw_args)
         .map_err(|e| std::io::Error::other(format!("{e}")))?;
     let matches = uu_app().try_get_matches_from(raw_args.iter())?;