Fix the comment

Author: link2xt

src/receive_imf.rs

@@ -2138,8 +2138,7 @@ async fn create_group(
 /// Returns `Vec` of group changes messages and, optionally, a better message to replace the
 /// original system message.
 ///
-/// * `to_ids` - contents of the `To` header for chat messages
-///              or combined `To` and `Cc` for non-chat messages
+/// * `to_ids` - contents of the `To` and `Cc` headers.
 /// * `is_partial_download` - whether the message is not fully downloaded.
 #[allow(clippy::too_many_arguments)]
 async fn apply_group_changes(