remove unused codes in se_a.py (#3049) #4326

Job	Run time
Build source distribution	26s
determine-arm64-runner	1s
Build wheels for cp311-manylinux_x86_64	6m 58s
Build wheels for cp311-manylinux_x86_64	5m 21s
Build wheels for cp311-macosx_x86_64	9m 46s
Build wheels for cp311-macosx_arm64	6m 24s
Build wheels for cp311-win_amd64	7m 29s
Build wheels for cp310-manylinux_aarch64	4m 30s
build_docker (12)	9m 26s
build_pypi_index	8s
upload_pypi	0s
build_docker (_cu11, 11)	7m 33s
deploy_pypi_index	7s
Pass testing build wheels	1s
	58m 10s

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