!7234 update mass gpu support.

Merge pull request !7234 from linqingke/mass

model_zoo/official/nlp/mass/src/transformer/infer_mass.py

@@ -22,20 +22,11 @@ from mindspore.common.tensor import Tensor
 from mindspore.train.model import Model
 from mindspore.train.serialization import load_checkpoint, load_param_into_net
 
-from mindspore import context
-
 from src.dataset import load_dataset
 from .transformer_for_infer import TransformerInferModel
 from .transformer_for_train import TransformerTraining
 from ..utils.load_weights import load_infer_weights
 
-context.set_context(
-    mode=context.GRAPH_MODE,
-    save_graphs=False,
-    device_target="Ascend",
-    reserve_class_name_in_scope=False)
-
-
 class TransformerInferCell(nn.Cell):
     """
     Encapsulation class of transformer network infer.