fix logging msg for block manager (#3701)

vllm/model_executor/parallel_utils/pynccl_utils.py

@@ -10,7 +10,6 @@ logger = logging.getLogger(__name__)
 try:
     from vllm.model_executor.parallel_utils.pynccl import (NCCLCommunicator,
                                                            ncclGetVersion)
-    logger.info(f"vLLM is using nccl=={ncclGetVersion()}")
 except Exception as e:
     # in non-NVIDIA environments, we can't import the nccl module
     # e.g. when running on machines with AMD GPUs
@@ -40,6 +39,7 @@ def init_process_group(world_size: int, local_rank: int, rank: int,
                        init_method: str) -> None:
     assert not is_initialized()
     global comm
+    logger.info(f"vLLM is using nccl=={ncclGetVersion()}")
     comm = NCCLCommunicator(init_method=init_method,
                             world_size=world_size,
                             local_rank=local_rank,