rm: remove remove_dir_all dependency #4335

use remove_dir_all::remove_dir_all;

// -- snip --

// we need the extra crate because apparently fs::remove_dir_all() does not function
// correctly on Windows
if let Err(e) = remove_dir_all(path) {
    had_err = true;
    if e.kind() == std::io::ErrorKind::PermissionDenied {
        // GNU compatibility (rm/fail-eacces.sh)
        // here, GNU doesn't use some kind of remove_dir_all
        // It will show directory+file
        show_error!("cannot remove {}: {}", path.quote(), "Permission denied");
    } else {
        show_error!("cannot remove {}: {}", path.quote(), e);
    }
}