fix: remove model_def_script from AtomicModel #6369

Job	Run time
Build source distribution	17s
determine-arm64-runner	1s
Build wheels for cp311-manylinux_x86_64	7m 26s
Build wheels for cp311-manylinux_x86_64	5m 34s
Build wheels for cp311-macosx_x86_64	6m 56s
Build wheels for cp311-macosx_arm64	4m 45s
Build wheels for cp311-win_amd64	6m 7s
Build wheels for cp310-manylinux_aarch64	5m 26s
build_docker (12)	3m 48s
build_docker (_cu11, 11)	4m 2s
build_pypi_index	10s
upload_pypi	0s
deploy_pypi_index	0s
Pass testing build wheels	4s
	44m 36s

Provide feedback