rustup-utils: Remove unused import
Trivial warning fix
@@ -9,7 +9,6 @@ use std::fs::{self, File};
use std::io::{self, Write};
use std::path::{Path, PathBuf};
use std::process::Command;
-use std::sync::atomic::{AtomicBool, Ordering, ATOMIC_BOOL_INIT};
use url::Url;
#[cfg(windows)]
