diff --git a/drivers/audio/ac97d/src/device.rs b/drivers/audio/ac97d/src/device.rs
index a83c9bcc48..66d732ef3a 100644
--- a/drivers/audio/ac97d/src/device.rs
+++ b/drivers/audio/ac97d/src/device.rs
@@ -1,5 +1,3 @@
-#![allow(dead_code)]
-
 use common::io::Pio;
 use redox_scheme::scheme::SchemeSync;
 use redox_scheme::CallerCtx;
diff --git a/drivers/audio/ac97d/src/main.rs b/drivers/audio/ac97d/src/main.rs
index 94d5e28e55..ca1d9b0f3a 100644
--- a/drivers/audio/ac97d/src/main.rs
+++ b/drivers/audio/ac97d/src/main.rs
@@ -1,9 +1,3 @@
-//#![deny(warnings)]
-
-extern crate event;
-extern crate spin;
-extern crate syscall;
-
 use std::io::{Read, Write};
 use std::os::unix::io::AsRawFd;
 use std::usize;
diff --git a/drivers/audio/ihdad/src/main.rs b/drivers/audio/ihdad/src/main.rs
index f762fb454c..9d3f6963a5 100755
--- a/drivers/audio/ihdad/src/main.rs
+++ b/drivers/audio/ihdad/src/main.rs
@@ -1,8 +1,3 @@
-extern crate bitflags;
-extern crate event;
-extern crate spin;
-extern crate syscall;
-
 use redox_scheme::scheme::register_sync_scheme;
 use redox_scheme::wrappers::ReadinessBased;
 use redox_scheme::Socket;
diff --git a/drivers/audio/sb16d/src/device.rs b/drivers/audio/sb16d/src/device.rs
index 54055c69d9..289522cff6 100644
--- a/drivers/audio/sb16d/src/device.rs
+++ b/drivers/audio/sb16d/src/device.rs
@@ -1,5 +1,3 @@
-#![allow(dead_code)]
-
 use std::{thread, time};
 
 use common::io::{Io, Pio, ReadOnly, WriteOnly};
diff --git a/drivers/audio/sb16d/src/main.rs b/drivers/audio/sb16d/src/main.rs
index 6abae32772..14358c35f6 100644
--- a/drivers/audio/sb16d/src/main.rs
+++ b/drivers/audio/sb16d/src/main.rs
@@ -1,5 +1,3 @@
-//#![deny(warnings)]
-
 use libredox::{flag, Fd};
 use redox_scheme::scheme::register_sync_scheme;
 use redox_scheme::wrappers::ReadinessBased;