tests: fix warnings on OpenBSD for unused imports in by-util/test_*

Signed-off-by: Laurent Cheylus <foxy@free.fr>

tests/by-util/test_du.rs

@@ -11,11 +11,14 @@ use regex::Regex;
 use crate::common::util::expected_result;
 use crate::common::util::TestScenario;
 
+#[cfg(not(target_os = "openbsd"))]
 const SUB_DIR: &str = "subdir/deeper";
 const SUB_DEEPER_DIR: &str = "subdir/deeper/deeper_dir";
 const SUB_DIR_LINKS: &str = "subdir/links";
 const SUB_DIR_LINKS_DEEPER_SYM_DIR: &str = "subdir/links/deeper_dir";
+#[cfg(not(target_os = "openbsd"))]
 const SUB_FILE: &str = "subdir/links/subwords.txt";
+#[cfg(not(target_os = "openbsd"))]
 const SUB_LINK: &str = "subdir/links/sublink.txt";
 
 #[test]

tests/by-util/test_install.rs

@@ -5,6 +5,7 @@
 // spell-checker:ignore (words) helloworld nodir objdump n'source
 
 use crate::common::util::{is_ci, run_ucmd_as_root, TestScenario};
+#[cfg(not(target_os = "openbsd"))]
 use filetime::FileTime;
 use std::fs;
 use std::os::unix::fs::{MetadataExt, PermissionsExt};

tests/by-util/test_ls.rs

@@ -15,6 +15,7 @@ use crate::common::util::TestScenario;
 #[cfg(all(unix, feature = "chmod"))]
 use nix::unistd::{close, dup};
 use regex::Regex;
+#[cfg(not(target_os = "openbsd"))]
 use std::collections::HashMap;
 #[cfg(target_os = "linux")]
 use std::ffi::OsStr;

tests/by-util/test_nohup.rs

@@ -4,6 +4,7 @@
 // file that was distributed with this source code.
 // spell-checker:ignore winsize Openpty openpty xpixel ypixel ptyprocess
 use crate::common::util::TestScenario;
+#[cfg(not(target_os = "openbsd"))]
 use std::thread::sleep;
 
 // General observation: nohup.out will not be created in tests run by cargo test

tests/by-util/test_pinky.rs

@@ -3,8 +3,12 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
+#[cfg(target_os = "openbsd")]
+use crate::common::util::TestScenario;
+#[cfg(not(target_os = "openbsd"))]
 use crate::common::util::{expected_result, TestScenario};
 use pinky::Capitalize;
+#[cfg(not(target_os = "openbsd"))]
 use uucore::entries::{Locate, Passwd};
 
 #[test]