drivers/audio: Minor code cleanups

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;

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;

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;

drivers/audio/sb16d/src/device.rs

@@ -1,5 +1,3 @@
-#![allow(dead_code)]
-
 use std::{thread, time};
 
 use common::io::{Io, Pio, ReadOnly, WriteOnly};

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;