Remove unused imports

3 files changed, 3 insertions, 3 deletions

diff --git a/src/libcollections/btree/node.rs b/src/libcollections/btree/node.rs
index 26479b3f559..198025536f0 100644
--- a/src/libcollections/btree/node.rs
+++ b/src/libcollections/btree/node.rs
@@ -23,7 +23,7 @@ use core::marker::PhantomData;
 use core::ops::{Deref, DerefMut, Index, IndexMut};
 use core::ptr::Unique;
 use core::{slice, mem, ptr, cmp};
-use alloc::heap::{self, EMPTY};
+use alloc::heap;
 
 use borrow::Borrow;
 
diff --git a/src/libcollections/string.rs b/src/libcollections/string.rs
index 8c0b52f71f8..05a4075f500 100644
--- a/src/libcollections/string.rs
+++ b/src/libcollections/string.rs
@@ -23,7 +23,7 @@ use core::fmt;
 use core::hash;
 use core::iter::FromIterator;
 use core::mem;
-use core::ops::{self, Deref, Add, Index};
+use core::ops::{self, Add};
 use core::ptr;
 use core::slice;
 use core::str::pattern::Pattern;
diff --git a/src/libcollections/vec.rs b/src/libcollections/vec.rs
index ddad7533a08..ab8dee31ee3 100644
--- a/src/libcollections/vec.rs
+++ b/src/libcollections/vec.rs
@@ -68,7 +68,7 @@ use core::hash::{self, Hash};
 use core::intrinsics::{arith_offset, assume, needs_drop};
 use core::iter::FromIterator;
 use core::mem;
-use core::ops::{Index, IndexMut, Deref};
+use core::ops::{Index, IndexMut};
 use core::ops;
 use core::ptr;
 use core::slice;