Remove redundant code

crates/optimism/consensus/src/validation/isthmus.rs

@@ -44,10 +44,7 @@ mod test {
         providers::BlockchainProvider2, test_utils::create_test_provider_factory_with_chain_spec,
         StateWriter,
     };
-    use reth_trie::{
-        test_utils::storage_root_prehashed, HashedPostState, HashedStorage, StorageRoot,
-    };
-    use reth_trie_db::DatabaseStorageRoot;
+    use reth_trie::{test_utils::storage_root_prehashed, HashedPostState, HashedStorage};
 
     use super::*;
 
@@ -71,7 +68,7 @@ mod test {
 
         // init test db
         // note: must be empty (default) chain spec to ensure storage is empty after init genesis,
-        // otherwise can't use `storage_root_prehashed` to verify storage root later
+        // otherwise can't use `storage_root_prehashed` to determine storage root later
         let provider_factory =
             create_test_provider_factory_with_chain_spec(Arc::new(OpChainSpec::default()));
         let _ = init_genesis(&provider_factory).unwrap();
@@ -81,18 +78,13 @@ mod test {
         provider_rw.write_hashed_state(&state.clone().into_sorted()).unwrap();
         provider_rw.commit().unwrap();
 
-        // verify db write by loading database storage root
-        let provider_rw = provider_factory.provider_rw().unwrap();
-        let tx = provider_rw.tx_ref();
-        let (storage_root, _, _) =
-            StorageRoot::from_tx_hashed(tx, hashed_address).calculate(true).unwrap();
-        assert_eq!(storage_root, storage_root_prehashed(init_storage.storage));
-
         // create block header with withdrawals root set to storage root of l2tol1-msg-passer
-        let header = Header { withdrawals_root: Some(storage_root), ..Default::default() };
+        let header = Header {
+            withdrawals_root: Some(storage_root_prehashed(init_storage.storage)),
+            ..Default::default()
+        };
 
         // create state provider factory
-        drop(provider_rw);
         let state_provider_factory = BlockchainProvider2::new(provider_factory).unwrap();
 
         // validate block