fix clippy (#1334)

testing/integration-tests/src/full_client/blocks/mod.rs

@@ -214,7 +214,7 @@ async fn fetch_block_and_decode_extrinsic_details() {
         .collect::<Vec<_>>();
 
     // All blocks contain a timestamp; check this first:
-    let timestamp = block_extrinsics.get(0).unwrap();
+    let timestamp = block_extrinsics.first().unwrap();
     timestamp.as_root_extrinsic::<node_runtime::Call>().unwrap();
     timestamp
         .as_extrinsic::<node_runtime::timestamp::calls::types::Set>()

testing/test-runtime/build.rs

@@ -103,10 +103,7 @@ async fn run() {
 mod client {
     pub use jsonrpsee::{
         client_transport::ws::{Receiver, Sender, Url, WsTransportClientBuilder},
-        core::{
-            client::{Client, ClientBuilder},
-            Error,
-        },
+        core::{client::Client, Error},
     };
 
     pub use jsonrpsee::core::{client::ClientT, rpc_params};