Fix clippy warnings (tower-rs#659)

Author: alexanderkjall

tower-http/src/cors/allow_credentials.rs

@@ -80,17 +80,12 @@ impl fmt::Debug for AllowCredentials {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Default)]
 enum AllowCredentialsInner {
     Yes,
+    #[default]
     No,
     Predicate(
         Arc<dyn for<'a> Fn(&'a HeaderValue, &'a RequestParts) -> bool + Send + Sync + 'static>,
     ),
 }
-
-impl Default for AllowCredentialsInner {
-    fn default() -> Self {
-        Self::No
-    }
-}

tower-http/src/cors/allow_private_network.rs

@@ -98,21 +98,16 @@ impl fmt::Debug for AllowPrivateNetwork {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Default)]
 enum AllowPrivateNetworkInner {
     Yes,
+    #[default]
     No,
     Predicate(
         Arc<dyn for<'a> Fn(&'a HeaderValue, &'a RequestParts) -> bool + Send + Sync + 'static>,
     ),
 }
 
-impl Default for AllowPrivateNetworkInner {
-    fn default() -> Self {
-        Self::No
-    }
-}
-
 #[cfg(test)]
 mod tests {
     #![allow(

tower-http/src/lib.rs

@@ -163,7 +163,7 @@
     clippy::all,
     clippy::dbg_macro,
     clippy::todo,
-    clippy::empty_enum,
+    clippy::empty_enums,
     clippy::enum_glob_use,
     clippy::mem_forget,
     clippy::unused_self,
@@ -173,7 +173,6 @@
     clippy::match_wildcard_for_single_variants,
     clippy::if_let_mutex,
     clippy::await_holding_lock,
-    clippy::match_on_vec_items,
     clippy::imprecise_flops,
     clippy::suboptimal_flops,
     clippy::lossy_float_literal,