base: Fix some lint issues.

matrix_sdk_base/src/state/json_store.rs

@@ -224,11 +224,9 @@ mod test {
     use crate::{
         identifiers::{room_id, user_id},
         push::Ruleset,
-        BaseClient, BaseClientConfig, Session,
+        Session,
     };
 
-    use matrix_sdk_test::{sync_response, SyncResponseFile};
-
     #[tokio::test]
     async fn test_store_client_state() {
         let dir = tempdir().unwrap();