Drop LLM endpoint from Stop-A full-data config (baseline-only run)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

configs/examples/dash0_qwen30b_a3b_stopA_fulldata.json

@@ -129,13 +129,6 @@
   "llm": {
     "system_prompt": "Tune community vLLM 0.20.0 serving for Qwen3-30B-A3B. Start from the default vLLM engine configuration, use only launch-safe patches, and optimize request_rate_per_gpu under the configured SLO.",
     "max_history_trials": 8,
-    "use_harness": true,
-    "endpoint": {
-      "provider": "codex",
-      "model": "gpt-5.4",
-      "stream": true,
-      "api_key_env": "OPENAI_API_KEY",
-      "timeout_s": 240
-    }
+    "use_harness": false
   }
 }