From 2b8207a56d74bf97d93db2aad962c7ce56d3b98a Mon Sep 17 00:00:00 2001
From: Edward Wang <edward.yu.wang@gmail.com>
Date: Sat, 28 Feb 2015 22:39:50 +0800
Subject: [PATCH] Remove two unsafe impls from `iter::Peekable`

These implementations were temporary workaround. Now #22828 has been
fixed, they can be removed.
---
 src/libcore/iter.rs | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/libcore/iter.rs b/src/libcore/iter.rs
index 94cc933d844..26acd757f89 100644
--- a/src/libcore/iter.rs
+++ b/src/libcore/iter.rs
@@ -68,7 +68,7 @@ use num::{ToPrimitive, Int};
 use ops::{Add, Deref, FnMut};
 use option::Option;
 use option::Option::{Some, None};
-use marker::{Send, Sized, Sync};
+use marker::Sized;
 use usize;
 
 /// An interface for dealing with "external iterators". These types of iterators
@@ -1783,10 +1783,6 @@ pub struct Peekable<I: Iterator> {
     peeked: Option<I::Item>,
 }
 
-// FIXME: after #22828 being fixed, the following unsafe impl should be removed
-unsafe impl<I: Iterator> Sync for Peekable<I> where I: Sync, I::Item: Sync {}
-unsafe impl<I: Iterator> Send for Peekable<I> where I: Send, I::Item: Send {}
-
 impl<I: Iterator + Clone> Clone for Peekable<I> where I::Item: Clone {
     fn clone(&self) -> Peekable<I> {
         Peekable {