fix(app-server) remove www warning (#7046)

### Summary
After #7022, we no longer need this warning. We should also clean up the
schema for the notification, but this is a quick fix to just stop the
behavior in the VSCE

## Testing
- [x] Ran locally

codex-rs/app-server/Cargo.toml

@@ -40,7 +40,6 @@ tracing = { workspace = true, features = ["log"] }
 tracing-subscriber = { workspace = true, features = ["env-filter", "fmt"] }
 opentelemetry-appender-tracing = { workspace = true }
 uuid = { workspace = true, features = ["serde", "v7"] }
-codex-windows-sandbox.workspace = true
 
 [dev-dependencies]
 app_test_support = { workspace = true }