diff --git a/aobench/Cargo.lock b/aobench/Cargo.lock
index 0684b30..a4130fe 100644
--- a/aobench/Cargo.lock
+++ b/aobench/Cargo.lock
@@ -1,3 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
diff --git a/aobench/src/main.rs b/aobench/src/main.rs
index 3aad3a5..46e9f62 100644
--- a/aobench/src/main.rs
+++ b/aobench/src/main.rs
@@ -1,8 +1,6 @@
-#[macro_use]
 extern crate log;
 extern crate rand;
 extern crate stderrlog;
-#[macro_use]
 extern crate structopt;
 
 use rand::Rng;