Remove unused import that breaks the build on rust nightly

diff --git a/src/cargo/ops/cargo_clean.rs b/src/cargo/ops/cargo_clean.rs
index e89e842d89a7381fceee00648cf4a56a86509f81..7b3676b5427f9cc533fc3c073b09f94997a03a39 100644 (file)
--- a/src/cargo/ops/cargo_clean.rs
+++ b/src/cargo/ops/cargo_clean.rs
@@ -1,6 +1,5 @@
 use std::default::Default;
 use std::fs;
-use std::io::prelude::*;
 use std::path::Path;
 
 use core::{Package, PackageSet, Profiles};