fix mocked_delete_file_version #566

Job	Run time
lint	52s
build	34s
cleanup_buckets	1s
test-linux-bundle	1m 32s
test-docker	11s
test-windows-bundle (windows-2019)	3m 5s
test-windows-bundle (windows-latest)	4m 21s
test (ubuntu-latest, 3.7)	56s
test (ubuntu-latest, 3.8)	56s
test (ubuntu-latest, 3.9)	55s
test (ubuntu-latest, 3.10)	51s
test (ubuntu-latest, 3.11)	1m 10s
test (ubuntu-latest, 3.12-dev)	1m 31s
test (ubuntu-latest, pypy-3.10)	1m 51s
test (macos-latest, 3.7)	1m 52s
test (macos-latest, 3.8)	1m 23s
test (macos-latest, 3.9)	1m 21s
test (macos-latest, 3.10)	1m 35s
test (macos-latest, 3.11)	1m 22s
test (windows-latest, 3.7)	2m 5s
test (windows-latest, 3.8)	2m 22s
test (windows-latest, 3.9)	2m 41s
test (windows-latest, 3.10)	2m 11s
test (windows-latest, 3.11)	4m 35s
doc	1m 58s
	42m 11s

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