perf: avoid slow Docker live lane cleanup

scripts/test-live-codex-harness-docker.sh

@@ -167,10 +167,6 @@ if [ "${OPENCLAW_LIVE_CODEX_HARNESS_AUTH:-codex-auth}" = "api-key" ]; then
   printf '%s\n' "$OPENAI_API_KEY" | "$NPM_CONFIG_PREFIX/bin/codex" login --with-api-key >/dev/null
 fi
 tmp_dir="$(mktemp -d)"
-cleanup() {
-  rm -rf "$tmp_dir"
-}
-trap cleanup EXIT
 source /src/scripts/lib/live-docker-stage.sh
 openclaw_live_stage_source_tree "$tmp_dir"
 mkdir -p "$tmp_dir/node_modules"