Revert "rebase"

This reverts commit 9ad5c1386f, reversing
changes made to 4b9e6f4383.

codex-rs/app-server/tests/suite/v2/thread_fork.rs

@@ -463,7 +463,6 @@ async fn thread_fork_ephemeral_remains_pathless_and_omits_listing() -> Result<()
                 text: "continue".to_string(),
                 text_elements: Vec::new(),
             }],
-            submission_type: None,
             ..Default::default()
         })
         .await?;