test: remove timeout from pop_sent_msg_ex()

Arbitrary timeouts often result in flaky tests,
especially if CI runners may be paused.
In this case however timeout was not used by any tests
and only slowed down the tests in cases where
no message is expected but non-zero timeout is set.

src/tests/pre_messages/forward_and_save.rs

@@ -1,5 +1,4 @@
 //! Tests about forwarding and saving Pre-Messages
-use std::time::Duration;
 
 use anyhow::Result;
 use pretty_assertions::assert_eq;
@@ -108,12 +107,7 @@ async fn test_receive_both() -> Result<()> {
     forward_msgs(alice, &[alice_msg_id], alice_chat_id).await?;
     let rev_order = false;
     let msg = bob
-        .recv_msg(
-            &alice
-                .pop_sent_msg_ex(rev_order, Duration::ZERO)
-                .await
-                .unwrap(),
-        )
+        .recv_msg(&alice.pop_sent_msg_ex(rev_order).await.unwrap())
         .await;
     assert_eq!(msg.download_state(), DownloadState::Available);
     assert_eq!(msg.is_forwarded(), true);