haiku: remove specific cfg guards, re-enable test

Author: Al Hoang

src/sys/termios.rs

@@ -441,7 +441,6 @@ libc_enum! {
     #[repr(usize)]
     #[non_exhaustive]
     pub enum SpecialCharacterIndices {
-        #[cfg(not(target_os = "haiku"))]
         VDISCARD,
         #[cfg(any(target_os = "dragonfly",
                 target_os = "freebsd",
@@ -452,7 +451,6 @@ libc_enum! {
                 target_os = "solaris"))]
         #[cfg_attr(docsrs, doc(cfg(all())))]
         VDSUSP,
-        #[cfg(not(target_os = "haiku"))]
         VEOF,
         VEOL,
         VEOL2,
@@ -465,14 +463,12 @@ libc_enum! {
         VERASE2,
         VINTR,
         VKILL,
-        #[cfg(not(target_os = "haiku"))]
         VLNEXT,
         #[cfg(not(any(all(target_os = "linux", target_arch = "sparc64"),
                 target_os = "illumos", target_os = "solaris")))]
         #[cfg_attr(docsrs, doc(cfg(all())))]
         VMIN,
         VQUIT,
-        #[cfg(not(target_os = "haiku"))]
         VREPRINT,
         VSTART,
         #[cfg(any(target_os = "dragonfly",
@@ -496,7 +492,6 @@ libc_enum! {
                 target_os = "illumos", target_os = "solaris")))]
         #[cfg_attr(docsrs, doc(cfg(all())))]
         VTIME,
-        #[cfg(not(target_os = "haiku"))]
         VWERASE,
         #[cfg(target_os = "dragonfly")]
         #[cfg_attr(docsrs, doc(cfg(all())))]
@@ -1113,5 +1108,7 @@ mod test {
         assert_eq!(Ok(BaudRate::B0), BaudRate::try_from(libc::B0));
         #[cfg(not(target_os = "haiku"))]
         assert!(BaudRate::try_from(999999999).is_err());
+        #[cfg(target_os = "haiku")]
+        assert!(BaudRate::try_from(99).is_err());
     }
 }