Remove unused code #8428

Job	Run time
integration-test-adls	7m 34s
cibw-dev-env-smoke-test	26s
integration-test	17m 27s
integration-test-gcs	6m 51s
integration-test-s3	7m 31s
lint-and-unit-test (3.13)	3m 3s
lint-and-unit-test (3.14)	2m 33s
lint-and-unit-test (3.12)	8m 51s
lint-and-unit-test (3.10)	3m 24s
lint-and-unit-test (3.11)	2m 58s
integration-coverage-report	29s
	1h 1m 7s

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