Fix duplicate imports in client.rs

Author: timvw

async-openai/src/client.rs

@@ -1,4 +1,5 @@
 use std::pin::Pin;
+use std::sync::Arc;
 
 use bytes::Bytes;
 use futures::{stream::StreamExt, Stream};
@@ -567,9 +568,6 @@ where
 }
 
 
-use crate::http_client::{BoxedHttpClient, HttpClient};
-use std::sync::Arc;
-
 /// Client with HttpClient trait support
 pub struct ClientWithTrait<C: Config> {
     http_client: BoxedHttpClient,