remove unused import

nikomatsakis · nikomatsakis · commit 4756d4a635ff · 2015-08-18T17:38:05.000-04:00
diff --git a/src/librustc_data_structures/unify/tests.rs b/src/librustc_data_structures/unify/tests.rs
@@ -12,7 +12,6 @@
 
 extern crate test;
 use self::test::Bencher;
-use std::collections::HashSet;
 use unify::{UnifyKey, UnificationTable};
 
 #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
