Rust 1.85 lints (#7019)

N/A


  2 changes:
1. Replace Option::map_or(true, ...) with is_none_or(...)
2. Remove unnecessary `Into::into` blocks where the type conversion is apparent from the types

consensus/types/src/beacon_block_body.rs

@@ -971,6 +971,7 @@ impl<E: EthSpec> From<BeaconBlockBody<E, FullPayload<E>>>
         Option<ExecutionPayload<E>>,
     )
 {
+    #[allow(clippy::useless_conversion)] // Not a useless conversion
     fn from(body: BeaconBlockBody<E, FullPayload<E>>) -> Self {
         map_beacon_block_body!(body, |inner, cons| {
             let (block, payload) = inner.into();

consensus/types/src/runtime_var_list.rs

@@ -134,13 +134,13 @@ impl<T: Decode> RuntimeVariableList<T> {
                 )));
             }
 
-            bytes
-                .chunks(<T as Decode>::ssz_fixed_len())
-                .try_fold(Vec::with_capacity(num_items), |mut vec, chunk| {
+            bytes.chunks(<T as Decode>::ssz_fixed_len()).try_fold(
+                Vec::with_capacity(num_items),
+                |mut vec, chunk| {
                     vec.push(<T as Decode>::from_ssz_bytes(chunk)?);
                     Ok(vec)
-                })
-                .map(Into::into)?
+                },
+            )?
         } else {
             ssz::decode_list_of_variable_length_items(bytes, Some(max_len))?
         };