Clean up.

src/lib.rs

@@ -1,4 +1,3 @@
-extern crate ordermap;
 extern crate rayon;
 extern crate serde;
 extern crate unreachable;
@@ -9,9 +8,7 @@ use std::fmt;
 use std::iter::{FromIterator, IntoIterator, Iterator};
 use std::ops;
 
-use ordermap::OrderMap;
 use rayon::iter::{FromParallelIterator, IntoParallelIterator, ParallelExtend, ParallelIterator};
-
 use serde::de::{SeqAccess, Visitor};
 use serde::ser::SerializeSeq;
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
@@ -24,7 +21,6 @@ const BITS: u64 = 64;
 
 type Block = u64;
 type Storage = HashMap<u64, Block, BitBuildHasher>;
-// type Storage = OrderMap<u64, Block, BitBuildHasher>;
 
 pub type BitHashMap<V> = HashMap<u64, V, BitBuildHasher>;