test: keep unified exec network denial local

codex-rs/core/tests/suite/unified_exec.rs

@@ -927,7 +927,7 @@ allow_local_binding = true
                 .set_permission_profile(permission_profile_for_config)
                 .expect("set permission profile");
         });
-    let test = builder.build_with_remote_env(server).await?;
+    let test = builder.build(server).await?;
     assert!(
         test.config.permissions.network.is_some(),
         "expected managed network proxy config to be present"