all: remove dead code

src/utils/oserror.rs

@@ -205,6 +205,7 @@ impl Display for OsError {
     }
 }
 
+#[cfg_attr(not(feature = "it"), allow(dead_code))]
 pub trait OsErrorExt {
     type Container;
 

src/utils/tri.rs

@@ -10,6 +10,7 @@ pub trait Try: Sized {
     where
         F: FnOnce() -> Result<(), Self>;
 
+    #[allow(dead_code)]
     fn tria<F>(f: F) -> Tria<Self, F>
     where
         F: Future<Output = Result<(), Self>>;

src/utils/windows.rs

@@ -1,11 +1,13 @@
 use crate::utils::ptr_ext::PtrExt;
 
+#[cfg_attr(not(feature = "it"), allow(dead_code))]
 pub trait WindowsExt<T> {
     type Windows<'a, const N: usize>: Iterator<Item = &'a [T; N]>
     where
         Self: 'a,
         T: 'a;
 
+    #[cfg_attr(not(feature = "rc_tracking"), allow(dead_code))]
     fn array_windows_ext<'a, const N: usize>(&'a self) -> Self::Windows<'a, N>;
     fn array_chunks_ext<'a, const N: usize>(&'a self) -> &'a [[T; N]];
 }