Implemented beta clippy lint recommendations (#1051)

common/client-libs/validator-client/src/client.rs

@@ -25,6 +25,7 @@ use validator_api_requests::models::{
 };
 
 #[cfg(feature = "nymd-client")]
+#[must_use]
 pub struct Config {
     api_url: Url,
     nymd_url: Url,

common/client-libs/validator-client/src/nymd/wallet/mod.rs

@@ -133,6 +133,7 @@ impl DirectSecp256k1HdWallet {
     }
 }
 
+#[must_use]
 pub struct DirectSecp256k1HdWalletBuilder {
     /// The password to use when deriving a BIP39 seed from a mnemonic.
     bip39_password: String,

common/client-libs/validator-client/src/validator_api/mod.rs

@@ -112,7 +112,7 @@ impl Client {
                 routes::MIXNODES,
                 routes::REWARDED,
                 routes::INCLUSION_CHANCE,
-                &mixnode_id.to_string(),
+                mixnode_id,
             ],
             NO_PARAMS,
         )