Remove unused kernel diagnostic from io-uring-test (#287)

* This diagnostic is both unused and unreliable because
  uname may return kernel versions that semver cannot
  parse, such as '6.8.9-300.fc40.x86_64'.

io-uring-test/Cargo.toml

@@ -13,7 +13,6 @@ anyhow = "1"
 tempfile = "3"
 once_cell = "1"
 socket2 = "0.5"
-semver = "1.0.21"
 
 [features]
 direct-syscall = [ "io-uring/direct-syscall" ]

io-uring-test/src/main.rs

@@ -4,20 +4,11 @@ mod tests;
 
 use io_uring::{cqueue, squeue, IoUring, Probe};
 use std::cell::Cell;
-use std::ffi::CStr;
-use std::mem;
 
 pub struct Test {
     probe: Probe,
     target: Option<String>,
     count: Cell<usize>,
-    kernel_version: semver::Version,
-}
-
-impl Test {
-    fn check_kernel_version(&self, min_version: &str) -> bool {
-        self.kernel_version >= semver::Version::parse(min_version).unwrap()
-    }
 }
 
 fn main() -> anyhow::Result<()> {
@@ -72,16 +63,6 @@ fn test<S: squeue::EntryMarker, C: cqueue::EntryMarker>(
         probe,
         target: std::env::args().nth(1),
         count: Cell::new(0),
-        kernel_version: {
-            let mut uname: libc::utsname = unsafe { mem::zeroed() };
-            unsafe {
-                assert!(libc::uname(&mut uname) >= 0);
-            }
-
-            let version = unsafe { CStr::from_ptr(uname.release.as_ptr()) };
-            let version = version.to_str().unwrap();
-            semver::Version::parse(version).unwrap()
-        },
     };
 
     tests::queue::test_nop(&mut ring, &test)?;