remove unnecessary clone

Author: mangas

chain/ethereum/src/chain.rs

@@ -125,7 +125,7 @@ impl BlockStreamBuilder<Chain> for EthereumStreamBuilder {
             .logger_factory
             .subgraph_logger(&deployment)
             .new(o!("component" => "BlockStream"));
-        let chain_store = chain.chain_store().clone();
+        let chain_store = chain.chain_store();
         let chain_head_update_stream = chain
             .chain_head_update_listener
             .subscribe(chain.name.clone(), logger.clone());