misc: Remove redundant "use" imports

With the nightly toolchain (2024-02-18) cargo check will flag up
redundant imports either because they are pulled in by the prelude on
earlier match.

Remove those redundant imports.

Signed-off-by: Rob Bradford <rbradford@rivosinc.com>

virtio-devices/src/vhost_user/blk.rs

@@ -16,7 +16,6 @@ use std::result;
 use std::sync::atomic::AtomicBool;
 use std::sync::{Arc, Barrier, Mutex};
 use std::thread;
-use std::vec::Vec;
 use versionize::{VersionMap, Versionize, VersionizeResult};
 use versionize_derive::Versionize;
 use vhost::vhost_user::message::{

virtio-devices/src/vhost_user/fs.rs

@@ -11,7 +11,7 @@ use crate::{
     VirtioInterrupt, VirtioSharedMemoryList, VIRTIO_F_IOMMU_PLATFORM,
 };
 use crate::{GuestMemoryMmap, GuestRegionMmap, MmapRegion};
-use libc::{self, c_void, off64_t, pread64, pwrite64};
+use libc::{c_void, off64_t, pread64, pwrite64};
 use seccompiler::SeccompAction;
 use std::io;
 use std::os::unix::io::AsRawFd;

virtio-devices/src/vhost_user/net.rs

@@ -16,7 +16,6 @@ use std::result;
 use std::sync::atomic::AtomicBool;
 use std::sync::{Arc, Barrier, Mutex};
 use std::thread;
-use std::vec::Vec;
 use versionize::{VersionMap, Versionize, VersionizeResult};
 use versionize_derive::Versionize;
 use vhost::vhost_user::message::{VhostUserProtocolFeatures, VhostUserVirtioFeatures};

virtio-devices/src/vhost_user/vu_common_ctrl.rs

@@ -15,7 +15,6 @@ use std::sync::atomic::Ordering;
 use std::sync::Arc;
 use std::thread::sleep;
 use std::time::{Duration, Instant};
-use std::vec::Vec;
 use vhost::vhost_kern::vhost_binding::{VHOST_F_LOG_ALL, VHOST_VRING_F_LOG};
 use vhost::vhost_user::message::{
     VhostUserHeaderFlag, VhostUserInflight, VhostUserProtocolFeatures, VhostUserVirtioFeatures,