fix lint, fmt & udeps errors

Cargo.lock

@@ -3238,7 +3238,6 @@ dependencies = [
  "data-encoding-macro",
  "dns-lookup",
  "dunce",
- "getopts",
  "lazy_static",
  "libc",
  "nix 0.23.1",

src/uu/du/src/du.rs

@@ -18,7 +18,7 @@ use std::env;
 use std::fs;
 #[cfg(not(windows))]
 use std::fs::Metadata;
-use std::io::{stderr, ErrorKind, Result, Write};
+use std::io::{ErrorKind, Result};
 use std::iter;
 #[cfg(not(windows))]
 use std::os::unix::fs::MetadataExt;
@@ -292,13 +292,12 @@ fn du(
         let read = match fs::read_dir(&my_stat.path) {
             Ok(read) => read,
             Err(e) => {
-                writeln!(
-                    stderr(),
+                eprintln!(
                     "{}: cannot read directory {}: {}",
                     options.util_name,
                     my_stat.path.quote(),
                     e
-                ).unwrap();
+                );
                 return Box::new(iter::once(my_stat));
             }
         };

src/uucore/Cargo.toml

@@ -19,7 +19,6 @@ path="src/lib/lib.rs"
 clap = "2.33.3"
 dns-lookup = { version="1.0.5", optional=true }
 dunce = "1.0.0"
-getopts = "<= 0.2.21"
 wild = "2.0"
 # * optional
 thiserror = { version="1.0", optional=true }