Fix a couple of warnings

drivers/audio/ihdad/src/hda/device.rs

@@ -1,6 +1,5 @@
 #![allow(dead_code)]
 
-use std::cmp;
 use std::collections::BTreeMap;
 use std::collections::HashMap;
 use std::fmt::Write;
@@ -16,7 +15,7 @@ use common::timeout::Timeout;
 use redox_scheme::scheme::SchemeSync;
 use redox_scheme::CallerCtx;
 use redox_scheme::OpenResult;
-use syscall::error::{Error, Result, EACCES, EBADF, EINVAL, EIO, ENODEV, EWOULDBLOCK};
+use syscall::error::{Error, Result, EACCES, EBADF, EIO, ENODEV, EWOULDBLOCK};
 
 use spin::Mutex;
 use syscall::schemev2::NewFdFlags;

drivers/audio/ihdad/src/main.rs

@@ -6,7 +6,6 @@ extern crate syscall;
 use redox_scheme::wrappers::ReadinessBased;
 use redox_scheme::Socket;
 use std::cell::RefCell;
-use std::fs::File;
 use std::io::{Read, Write};
 use std::os::unix::io::AsRawFd;
 use std::usize;
@@ -44,7 +43,7 @@ fn daemon(daemon: redox_daemon::Daemon) -> ! {
 
     let address = unsafe { pcid_handle.map_bar(0) }.ptr.as_ptr() as usize;
 
-    let mut irq_file = pci_allocate_interrupt_vector(&mut pcid_handle, "ihdad");
+    let irq_file = pci_allocate_interrupt_vector(&mut pcid_handle, "ihdad");
 
     {
         let vend_prod: u32 = ((pci_config.func.full_device_id.vendor_id as u32) << 16)

drivers/common/src/timeout.rs

@@ -1,4 +1,4 @@
-use std::{thread, time::{Duration, Instant}};
+use std::time::{Duration, Instant};
 
 pub struct Timeout {
     instant: Instant,
@@ -42,4 +42,4 @@ impl Timeout {
             Err(())
         }
     }
-}
+}

drivers/net/alxd/src/main.rs

@@ -9,15 +9,12 @@ extern crate syscall;
 use std::fs::File;
 use std::io::{Read, Write};
 use std::os::fd::AsRawFd;
-use std::os::unix::io::{FromRawFd, RawFd};
 use std::{env, iter};
 
 use event::{user_data, EventQueue};
-use libredox::flag;
 use redox_scheme::wrappers::ReadinessBased;
 use redox_scheme::Socket;
 use std::cell::RefCell;
-use syscall::error::EWOULDBLOCK;
 
 pub mod device;
 

drivers/net/rtl8139d/src/main.rs

@@ -55,7 +55,7 @@ fn daemon(daemon: redox_daemon::Daemon) -> ! {
 
     let bar = map_bar(&mut pcid_handle);
 
-    let mut irq_file = pci_allocate_interrupt_vector(&mut pcid_handle, "rtl8139d");
+    let irq_file = pci_allocate_interrupt_vector(&mut pcid_handle, "rtl8139d");
 
     let mut scheme = NetworkScheme::new(
         move || unsafe {

drivers/net/rtl8168d/src/main.rs

@@ -55,7 +55,7 @@ fn daemon(daemon: redox_daemon::Daemon) -> ! {
 
     let bar = map_bar(&mut pcid_handle);
 
-    let mut irq_file = pci_allocate_interrupt_vector(&mut pcid_handle, "rtl8168d");
+    let irq_file = pci_allocate_interrupt_vector(&mut pcid_handle, "rtl8168d");
 
     let mut scheme = NetworkScheme::new(
         move || unsafe {