Only emit warning about internal tokenizer if it isn't being used (#939)

vllm/transformers_utils/tokenizer.py

@@ -25,7 +25,8 @@ def get_tokenizer(
                 "Cannot use the fast tokenizer in slow tokenizer mode.")
         kwargs["use_fast"] = False
 
-    if "llama" in tokenizer_name.lower() and kwargs.get("use_fast", True):
+    if ("llama" in tokenizer_name.lower() and kwargs.get("use_fast", True)
+            and tokenizer_name != _FAST_LLAMA_TOKENIZER):
         logger.info(
             "For some LLaMA-based models, initializing the fast tokenizer may "
             "take a long time. To eliminate the initialization time, consider "