Derive equality, ordering traits for http::Status.

`PartialEq` when not derived results in `StructuralPartialEq` not being
implemented. As this was the case for `http::Status`, matching against
constants like `Status::Unauthorized` was not allowed.

This commit replaces the manual implementations of equality traits
(`PartialEq`, `Eq`) and ordering traits (`PartialOrd`, `Ord`) for
`http::Status` with `#[derive]`.

Resolves #2844.

core/http/src/status.rs

@@ -112,7 +112,7 @@ impl StatusClass {
 /// }
 /// # }
 /// ```
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
 pub struct Status {
     /// The HTTP status code associated with this status.
     pub code: u16,
@@ -354,32 +354,6 @@ impl fmt::Display for Status {
     }
 }
 
-impl std::hash::Hash for Status {
-    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
-        self.code.hash(state)
-    }
-}
-
-impl PartialEq for Status {
-    fn eq(&self, other: &Self) -> bool {
-        self.code.eq(&other.code)
-    }
-}
-
-impl Eq for Status { }
-
-impl PartialOrd for Status {
-    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
-        Some(self.cmp(other))
-    }
-}
-
-impl Ord for Status {
-    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
-        self.code.cmp(&other.code)
-    }
-}
-
 #[cfg(feature = "serde")]
 mod serde_impl {
     use super::*;