chore: fix the build breakage that came from a merge race (#10239)

I think I needed to rebase on top of
https://github.com/openai/codex/pull/10167 before merging
https://github.com/openai/codex/pull/10208.

codex-rs/Cargo.lock

@@ -1298,7 +1298,6 @@ version = "0.0.0"
 dependencies = [
  "async-trait",
  "base64",
- "codex-app-server-protocol",
  "codex-backend-client",
  "codex-core",
  "codex-otel",