tests/tail: Cleanup old disabled test for warning of following indefi…

…nitely

tests/by-util/test_tail.rs

@@ -379,61 +379,6 @@ fn test_follow_stdin_name_retry() {
  }
 }
 
-#[test]
-#[cfg(target_os = "linux")]
-#[cfg(disable_until_fixed)]
-fn test_follow_stdin_explicit_indefinitely() {
- // inspired by: "gnu/tests/tail-2/follow-stdin.sh"
- // tail -f - /dev/null </dev/tty
- // tail: warning: following standard input indefinitely is ineffective
- // ==> standard input <==
-
- let ts = TestScenario::new(util_name!());
-
- let mut p = ts
- .ucmd()
- .set_stdin(Stdio::null())
- .args(&["-f", "-", "/dev/null"])
- .run_no_wait();
-
- p.make_assertion_with_delay(500).is_alive();
- p.kill()
- .make_assertion()
- .with_all_output()
- .stdout_is("==> standard input <==")
- .stderr_is("tail: warning: following standard input indefinitely is ineffective");
-
- // Also:
- // $ echo bar > foo
- //
- // $ tail -f - -
- // tail: warning: following standard input indefinitely is ineffective
- // ==> standard input <==
- //
- // $ tail -f - foo
- // tail: warning: following standard input indefinitely is ineffective
- // ==> standard input <==
- //
- //
- // $ tail -f - foo
- // tail: warning: following standard input indefinitely is ineffective
- // ==> standard input <==
- //
- // $ tail -f foo -
- // tail: warning: following standard input indefinitely is ineffective
- // ==> foo <==
- // bar
- //
- // ==> standard input <==
- //
-
- // $ echo f00 | tail -f foo -
- // bar
- //
-
- // TODO: Implement the above behavior of GNU's tail for following stdin indefinitely
-}
-
 #[test]
 fn test_follow_bad_fd() {
  // Provoke a "bad file descriptor" error by closing the fd