Use `accelerator="cpu"` in pytorch-lightning > 1.6.4 (#6167)
Use `accelerator="cpu"` in pytorch-lightning > 1.6.4 (#6167)

* Use cpu in pytorch-lightning > 1.6.4

Signed-off-by: harupy <e7c128a96f7b207246da7c828c67136267e8d868@gmail.com>

* fix comparison

Signed-off-by: harupy <e7c128a96f7b207246da7c828c67136267e8d868@gmail.com>
mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow