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/transport/pci_common_config.rs

@@ -330,8 +330,6 @@ mod tests {
     use super::*;
     use crate::GuestMemoryMmap;
     use crate::{ActivateResult, VirtioInterrupt};
-    use std::sync::Arc;
-    use virtio_queue::Queue;
     use vm_memory::GuestMemoryAtomic;
     use vmm_sys_util::eventfd::EventFd;