diff --git a/hunter/src/worker.rs b/hunter/src/worker.rs
index 1122d9d..c9652c5 100644
--- a/hunter/src/worker.rs
+++ b/hunter/src/worker.rs
@@ -230,10 +230,6 @@ async fn process_posts(
         None
     };
 
-    let introduce_hosts = introduce_hosts.into_iter()
-        .map(|host| host.to_owned())
-        .collect();
-
     (new_post_ratio, introduce_hosts)
 }