Remove redundant clone (solana-labs#31690)

Tyera · wen-coding · commit f86807ff930d · 2023-05-17T22:50:00.000-07:00
diff --git a/rpc/src/rpc_service.rs b/rpc/src/rpc_service.rs
@@ -486,7 +486,7 @@ impl JsonRpcService {
             receiver,
             &connection_cache,
             send_transaction_service_config,
-            exit.clone(),
+            exit,
         ));
 
         #[cfg(test)]
