// option. This file may not be copied, modified, or distributed
// except according to those terms.
-use borrow::{Borrow, Cow, ToOwned};
+use borrow::{Borrow, Cow};
use fmt::{self, Debug};
use mem;
-use string::String;
use ops;
use cmp;
use hash::{Hash, Hasher};
-use vec::Vec;
use sys::os_str::{Buf, Slice};
use sys_common::{AsInner, IntoInner, FromInner};