all: fix clippy on beta toolchain (#1420)

* all: fix clippy::derive-partial-eq-without-eq

* all: fix clippy::let-and-return

* all: fix clippy::unnecessary-to-owned

* all: fix clippy::needless-return

mixnode/src/node/node_description.rs

@@ -5,7 +5,7 @@ use std::{fs, io};
 
 pub(crate) const DESCRIPTION_FILE: &str = "description.toml";
 
-#[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
+#[derive(Clone, Debug, Deserialize, PartialEq, Eq, Serialize)]
 pub struct NodeDescription {
     pub(crate) name: String,
     pub(crate) description: String,