Revert "Stabilize RangeArgument"

This reverts commit 143206d54d7558c2326212df99efc98110904fdb.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs
index 1f0894d39d4..79d1ccf637d 100644
--- a/src/liballoc/string.rs
+++ b/src/liballoc/string.rs
@@ -59,14 +59,15 @@
 use core::fmt;
 use core::hash;
 use core::iter::{FromIterator, FusedIterator};
-use core::ops::{self, Add, AddAssign, Index, IndexMut, RangeArgument};
-use core::ops::Bound::{Excluded, Included, Unbounded};
+use core::ops::{self, Add, AddAssign, Index, IndexMut};
 use core::ptr;
 use core::str::pattern::Pattern;
 use std_unicode::lossy;
 use std_unicode::char::{decode_utf16, REPLACEMENT_CHARACTER};
 
 use borrow::{Cow, ToOwned};
+use range::RangeArgument;
+use Bound::{Excluded, Included, Unbounded};
 use str::{self, from_boxed_utf8_unchecked, FromStr, Utf8Error, Chars};
 use vec::Vec;
 use boxed::Box;