minor: Fix cargo-clippy-sdk-rust lints

Author: MaxFangX

sdk-rust/src/unstable/wallet_db.rs

@@ -19,6 +19,7 @@ use crate::{
 ///
 /// [`LexeWallet`]: crate::wallet::LexeWallet
 pub struct WalletDb<F> {
+    #[allow(dead_code)] // TODO(max): Remove once stable
     user_db_config: WalletUserDbConfig,
 
     payments_db: PaymentsDb<F>,
@@ -143,6 +144,7 @@ impl WalletDb<DiskFs> {
     }
 
     /// Get the user database configuration.
+    #[allow(dead_code)] // TODO(max): Remove once stable
     pub fn user_db_config(&self) -> &WalletUserDbConfig {
         &self.user_db_config
     }

sdk-rust/src/wallet.rs

@@ -63,7 +63,9 @@ pub struct LexeWallet<Db> {
 
     gateway_client: GatewayClient,
     node_client: NodeClient,
+    #[allow(dead_code)] // TODO(max): Remove
     bip353_client: Bip353Client,
+    #[allow(dead_code)] // TODO(max): Remove
     lnurl_client: LnurlClient,
 
     _marker: PhantomData<Db>,