Remove redundant calls to clone

No need to clone copy types, found by clippy.

src/wallet/coin_selection.rs

@@ -804,7 +804,7 @@ mod test {
             .coin_select(
                 &database,
                 vec![],
-                utxos.clone(),
+                utxos,
                 FeeRate::from_sat_per_vb(1.0),
                 99932, // first utxo's effective value
                 0.0,

src/wallet/tx_builder.rs

@@ -678,7 +678,7 @@ mod test {
         use std::str::FromStr;
 
         let original_tx = ordering_test_tx!();
-        let mut tx = original_tx.clone();
+        let mut tx = original_tx;
 
         TxOrdering::BIP69Lexicographic.sort_tx(&mut tx);