chore: remove kernel_version.rs module

With all the 4.14 checks gone, this module is dead code, so remove it.
If it ever becomes useful again, we can reintroduce it, that's what we
have version control for after all.

Signed-off-by: Patrick Roy <[email protected]>

Author: roypat

src/utils/src/kernel_version.rs

@@ -13,7 +13,6 @@ pub use vmm_sys_util::{
 
 pub mod arg_parser;
 pub mod byte_order;
-pub mod kernel_version;
 pub mod net;
 pub mod signal;
 pub mod sm;

src/utils/src/lib.rs

@@ -30,8 +30,6 @@ pub enum BlockIoError {
     Sync(SyncIoError),
     /// Async error: {0}
     Async(AsyncIoError),
-    /// Could not get kernel version: {0}
-    GetKernelVersion(utils::kernel_version::KernelVersionError),
 }
 
 impl BlockIoError {

src/vmm/src/devices/virtio/block/virtio/io/mod.rs

@@ -3,7 +3,6 @@
 use std::fmt::Debug;
 
 use serde::{Deserialize, Serialize};
-use utils::kernel_version;
 
 use crate::cpu_config::templates::{CpuTemplateType, CustomCpuTemplate, StaticCpuTemplate};
 
@@ -36,14 +35,6 @@ pub enum VmConfigError {
     InitrdAndHugePages,
 }
 
-// We cannot do a `KernelVersion(kernel_version::Error)` variant because `kernel_version::Error`
-// does not implement `PartialEq, Eq` (due to containing an io error).
-impl From<kernel_version::KernelVersionError> for VmConfigError {
-    fn from(_: kernel_version::KernelVersionError) -> Self {
-        VmConfigError::KernelVersion
-    }
-}
-
 /// Describes the possible (huge)page configurations for a microVM's memory.
 #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Serialize, Deserialize)]
 pub enum HugePageConfig {