clippy

runtime/src/accounts_db.rs

@@ -1519,13 +1519,9 @@ impl AccountsDB {
             hashes = new_hashes.chunks(fanout).map(|x| x.to_vec()).collect();
         }
         let mut hasher = Hasher::default();
-        hashes
-            .into_iter()
-            .flatten()
-            .map(|hash| hash)
-            .for_each(|hash| {
-                hasher.hash(hash.as_ref());
-            });
+        hashes.into_iter().flatten().for_each(|hash| {
+            hasher.hash(hash.as_ref());
+        });
         hasher.result()
     }
 

runtime/src/bank.rs

@@ -198,10 +198,7 @@ pub enum HashAgeKind {
 
 impl HashAgeKind {
     pub fn is_durable_nonce(&self) -> bool {
-        match self {
-            HashAgeKind::DurableNonce(_, _) => true,
-            _ => false,
-        }
+        matches!(self, HashAgeKind::DurableNonce(_, _))
     }
 }
 

runtime/src/nonce_utils.rs

@@ -23,10 +23,8 @@ pub fn transaction_uses_durable_nonce(tx: &Transaction) -> Option<&CompiledInstr
                 Some(program_id) => system_program::check_id(&program_id),
                 _ => false,
             }
-        } &&  match limited_deserialize(&maybe_ix.data) {
-            Ok(SystemInstruction::AdvanceNonceAccount) => true,
-            _ => false,
-        })
+        } && matches!(limited_deserialize(&maybe_ix.data), Ok(SystemInstruction::AdvanceNonceAccount))
+        )
 }
 
 pub fn get_nonce_pubkey_from_instruction<'a>(