remove enable_hccl setting in context for vgg16

example/vgg16_cifar10/train.py

@@ -71,7 +71,6 @@ if __name__ == '__main__':
     device_num = int(os.environ.get("DEVICE_NUM", 1))
     if device_num > 1:
         context.reset_auto_parallel_context()
-        context.set_context(enable_hccl=True)
         context.set_auto_parallel_context(device_num=device_num, parallel_mode=ParallelMode.DATA_PARALLEL,
                                           mirror_mean=True)
         init()