Remove the warning in hl_batch_norm_forward_inference function.

paddle/cuda/src/hl_cuda_cudnn.cc

@@ -1023,14 +1023,6 @@ void hl_batch_norm_forward_inference(hl_tensor_descriptor inputDesc,
   real beta = 1.0f;
   cudnnBatchNormMode_t mode = CUDNN_BATCHNORM_SPATIAL;
 
-  int batch_size = ((cudnn_tensor_descriptor)inputDesc)->batch_size;
-  if (batch_size > 1024 && g_cudnn_lib_version < 6000) {
-    LOG(INFO) << " To process current batch data with size " << batch_size
-              << " (>1024), cudnnBatchNorm requires cuDNN version >= 6000."
-              << " If there is an error complaining CUDNN_STATUS_NOT_SUPPORTED,"
-              << " just recompile PaddlePaddle with cuDNN >= 6000, replacing"
-              << " current version " << g_cudnn_lib_version;
-  }
   CHECK_CUDNN(
       dynload::cudnnBatchNormalizationForwardInference(t_resource.cudnn_handle,
                                                        mode,