minor: disable warning on auto-deduce (#1458)

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Author: yyihuang

flashinfer/comm/trtllm_ar.py

@@ -822,9 +822,6 @@ def trtllm_allreduce_fusion(
     """
 
     if use_oneshot is None:
-        logging.warning(
-            "use_oneshot is not specified. It would be enabled if token_num is less than the one-shot max token number (currently 128) for min-latency mode."
-        )
         use_oneshot = token_num <= 128
 
     if not use_oneshot: