fix clippy

mls-rs/src/group/state_repo.rs

@@ -325,7 +325,10 @@ mod tests {
         assert_eq!(test_repo.pending_commit.updates.len(), 1);
         assert!(test_repo.pending_commit.inserts.is_empty());
 
-        assert_eq!(test_repo.pending_commit.updates.get(0).unwrap(), &to_update);
+        assert_eq!(
+            test_repo.pending_commit.updates.first().unwrap(),
+            &to_update
+        );
 
         // Make sure you can access an epoch pending update
         let psk_id = ResumptionPsk {

mls-rs/src/tree_kem/mod.rs

@@ -1266,12 +1266,8 @@ mod tests {
         let original_leaf_count = tree.occupied_leaf_count();
 
         // Remove two leaves from the tree
-        let expected_result: Vec<(LeafIndex, LeafNode)> = indexes
-            .clone()
-            .into_iter()
-            .zip(key_packages)
-            .map(|(index, ln)| (index, ln))
-            .collect();
+        let expected_result: Vec<(LeafIndex, LeafNode)> =
+            indexes.clone().into_iter().zip(key_packages).collect();
 
         let res = tree
             .remove_leaves(

mls-rs/src/tree_kem/private.rs

@@ -213,7 +213,7 @@ mod tests {
         let (public_tree, mut charlie_private, alice_private, path_secret) =
             update_secrets_setup(cipher_suite).await;
 
-        let existing_private = charlie_private.secret_keys.get(0).cloned().unwrap();
+        let existing_private = charlie_private.secret_keys.first().cloned().unwrap();
 
         // Add the secrets for Charlie to his private key
         charlie_private
@@ -295,6 +295,6 @@ mod tests {
         assert!(private_key.secret_keys.iter().skip(1).all(|n| n.is_none()));
 
         // The secret key for our leaf should have been updated accordingly
-        assert_eq!(private_key.secret_keys.get(0).unwrap(), &Some(new_secret));
+        assert_eq!(private_key.secret_keys.first().unwrap(), &Some(new_secret));
     }
 }