sort: enable clippy::suspicious_open_options on OpenBSD

On OpenBSD 7.6 (release October 2024), Rust version = 1.81.0 => we can now enable
clippy::suspicious_open_options.

Revert commit ee4392e

Signed-off-by: Laurent Cheylus <[email protected]>

Author: lcheylus

src/uu/sort/src/sort.rs

@@ -258,9 +258,7 @@ impl Output {
         let file = if let Some(name) = name {
             // This is different from `File::create()` because we don't truncate the output yet.
             // This allows using the output file as an input file.
-            // clippy::suspicious_open_options supported only for Rust >= 1.77.0
-            // Rust version = 1.76 on OpenBSD stable/7.5
-            #[cfg_attr(not(target_os = "openbsd"), allow(clippy::suspicious_open_options))]
+            #[allow(clippy::suspicious_open_options)]
             let file = OpenOptions::new()
                 .write(true)
                 .create(true)