diff --git a/Cargo.toml b/Cargo.toml
index 896f38b..ced2edb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,4 @@ name = "pmtree"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
diff --git a/src/tree.rs b/src/tree.rs
index acfabbf..e8efb4d 100644
--- a/src/tree.rs
+++ b/src/tree.rs
@@ -1,6 +1,5 @@
 use crate::*;
 
-#[derive(Default)]
 pub struct MerkleTree<D, H>
 where
     D: Database,