Fix benches
diff --git a/benches/spawn.rs b/benches/spawn.rs
index c8f43d1..e9f93ce 100644
--- a/benches/spawn.rs
+++ b/benches/spawn.rs
@@ -10,14 +10,14 @@
 #[bench]
 fn task_create(b: &mut Bencher) {
     b.iter(|| {
-        async_task::spawn(async {}, drop, ());
+        async_task::spawn(async {}, drop);
     });
 }
 
 #[bench]
 fn task_run(b: &mut Bencher) {
     b.iter(|| {
-        let (task, handle) = async_task::spawn(async {}, drop, ());
+        let (task, handle) = async_task::spawn(async {}, drop);
         task.run();
         executor::block_on(handle).unwrap();
     });