tests: fix Freebsd test failures

tests/by-util/test_tail.rs

@@ -20,11 +20,6 @@ use std::thread::sleep;
 #[cfg(unix)]
 use std::time::Duration;
 
-#[cfg(target_os = "linux")]
-pub static BACKEND: &str = "inotify";
-// #[cfg(all(unix, not(target_os = "linux")))]
-// pub static BACKEND: &str = "kqueue";
-
 static FOOBAR_TXT: &str = "foobar.txt";
 static FOOBAR_2_TXT: &str = "foobar2.txt";
 static FOOBAR_WITH_NULL_TXT: &str = "foobar_with_null.txt";
@@ -1446,6 +1441,8 @@ fn test_retry9() {
     // Ensure that inotify will switch to polling mode if directory
     // of the watched file was removed and recreated.
 
+    use tail::text::BACKEND;
+
     let ts = TestScenario::new(util_name!());
     let at = &ts.fixtures;
     let watched_file = std::path::Path::new("watched_file");

tests/by-util/test_wc.rs

@@ -1,6 +1,3 @@
-#[cfg(all(unix, not(target_os = "macos")))]
-use pretty_assertions::assert_ne;
-
 use crate::common::util::*;
 
 // spell-checker:ignore (flags) lwmcL clmwL ; (path) bogusfile emptyfile manyemptylines moby notrailingnewline onelongemptyline onelongword weirdchars
@@ -404,6 +401,7 @@ fn test_read_from_nonexistent_file() {
 #[test]
 #[cfg(any(target_os = "linux", target_os = "android"))]
 fn test_files_from_pseudo_filesystem() {
+    use pretty_assertions::assert_ne;
     let result = new_ucmd!().arg("-c").arg("/proc/cpuinfo").succeeds();
     assert_ne!(result.stdout_str(), "0 /proc/cpuinfo\n");
 }