remove unused import #2980

Job	Run time
build-and-push-docker-images	30m 30s
build-and-test-cpp-aarch64 (openblas)	4m 33s
build-and-test-cpp-x86_64 (ubuntu-20.04, mkl)	6m 37s
build-and-test-cpp-x86_64 (ubuntu-20.04, dnnl)	5m 45s
build-python-wheels (ubuntu-20.04, auto64)	36m 56s
build-python-wheels (windows-2019, auto64)	46m 35s
check-python-style	7s
build-python-wheels (ubuntu-20.04, aarch64)	1h 36m 2s
build-python-wheels (macos-13, arm64)	9m 38s
test-python-wheels (ubuntu-20.04)	10m 45s
test-python-wheels (windows-2019)	4m 27s
build-and-deploy-docs	24s
publish-python-wheels-on-pypi	0s
	4h 12m 19s

Provide feedback