Fix warning on non-Linux platforms

Author: djc

src/lib.rs

@@ -1,6 +1,5 @@
 use std::{
     env,
-    fmt::Write as _,
     fs::File,
     io::{BufReader, BufWriter, Read, Write},
     path::PathBuf,
@@ -35,9 +34,11 @@ pub enum Workload {
 
 #[cfg(target_os = "linux")]
 mod arch {
-    use indicatif::{ProgressBar, ProgressStyle};
+    use std::fmt::Write;
     use std::time::Duration;
 
+    use indicatif::{ProgressBar, ProgressStyle};
+
     use super::*;
 
     pub const SPAWN_ERROR: &str = "could not spawn perf";