remove orphan files #8508

Job	Run time
integration-test-gcs	7m 1s
integration-test-adls	7m 8s
integration-test	16m 50s
cibw-dev-env-smoke-test	26s
lint-and-unit-test (3.10)	9m 2s
lint-and-unit-test (3.11)	8m 42s
integration-test-s3	7m 25s
lint-and-unit-test (3.14)	12m 28s
lint-and-unit-test (3.12)	9m 4s
lint-and-unit-test (3.13)	9m 7s
integration-coverage-report	33s
	1h 27m 46s

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