Fix cylinder2d_unsteady_transformer_physx (#906)

Author: HydrogenSulfate

docs/zh/examples/cylinder2d_unsteady_transformer_physx.md

@@ -33,18 +33,6 @@
     python train_transformer.py mode=export EMBEDDING_MODEL_PATH=https://paddle-org.bj.bcebos.com/paddlescience/models/cylinder/cylinder_pretrained.pdparams
     ```
 
-=== "模型推理命令"
-
-    ``` sh
-    # linux
-    wget -nc https://paddle-org.bj.bcebos.com/paddlescience/datasets/transformer_physx/cylinder_training.hdf5 -P ./datasets/
-    wget -nc https://paddle-org.bj.bcebos.com/paddlescience/datasets/transformer_physx/cylinder_valid.hdf5 -P ./datasets/
-    # windows
-    # curl https://paddle-org.bj.bcebos.com/paddlescience/datasets/transformer_physx/cylinder_training.hdf5 --output ./datasets/cylinder_training.hdf5
-    # curl https://paddle-org.bj.bcebos.com/paddlescience/datasets/transformer_physx/cylinder_valid.hdf5 --output ./datasets/cylinder_valid.hdf5
-    python train_transformer.py mode=infer
-    ```
-
 === "模型导出命令"
 
     ``` sh