fix: delete stop

Signed-off-by: Jiaru Jiang <[email protected]>

Author: PauiC

ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/agent/MLChatAgentRunner.java

@@ -998,7 +998,6 @@ void generateLLMSummary(List<ModelTensors> stepsSummary, LLMSpec llmSpec, String
             String summaryPrompt = String.format(Locale.ROOT, SUMMARY_PROMPT_TEMPLATE, String.join("\n", stepStrings));
             summaryParams.put("inputs", summaryPrompt);
             summaryParams.put(PROMPT, summaryPrompt);
-            summaryParams.putIfAbsent("stop", gson.toJson(new String[] { "\n\n", "```" }));
 
             ActionRequest request = new MLPredictionTaskRequest(
                 llmSpec.getModelId(),