[ci skip] fix clippy

Author: brentstone

tests/src/e2e/ledger_tests.rs

@@ -645,7 +645,7 @@ fn masp_txs_and_queries() -> Result<()> {
 
     let validator_one_rpc = get_actor_rpc(&test, &Who::Validator(0));
 
-    let ep1 = epoch_sleep(&test, &validator_one_rpc, 720)?;
+    let _ep1 = epoch_sleep(&test, &validator_one_rpc, 720)?;
 
     let txs_args = vec![
         // 2. Attempt to spend 10 BTC at SK(A) to PA(B)