Remove unneded monkeypatch.

Author: purple4reina

tests/test_wrapper.py

@@ -882,7 +882,6 @@ def LLMObs_flush(*args, **kwargs):
         LLMObs_flush_calls.append((args, kwargs))
         return original_LLMObs_flush(*args, **kwargs)
 
-    monkeypatch.setattr("datadog_lambda.wrapper.is_new_sandbox", lambda: True)
     monkeypatch.setattr("datadog_lambda.wrapper.LLMObs.enable", LLMObs_enable)
     monkeypatch.setattr("datadog_lambda.wrapper.LLMObs.flush", LLMObs_flush)