Auto merge of #23293 - tbu-:pr_additive_multiplicative, r=alexcrichton

Previously it could not be implemented for types outside `libcore/iter.rs` due
to coherence issues.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libunicode/u_str.rs b/src/libunicode/u_str.rs
index 441a3a40a61..6852cfe11eb 100644
--- a/src/libunicode/u_str.rs
+++ b/src/libunicode/u_str.rs
@@ -20,7 +20,7 @@ use core::prelude::*;
 
 use core::char;
 use core::cmp;
-use core::iter::{Filter, AdditiveIterator};
+use core::iter::Filter;
 use core::mem;
 use core::slice;
 use core::str::Split;