Unused-imports bug fix #1703

Job	Run time
tests (ubuntu-latest, unit, 3.8)	45s
tests (ubuntu-latest, unit, 3.12)	57s
tests (ubuntu-latest, integration, 3.8)	2m 33s
tests (ubuntu-latest, integration, 3.12)	3m 11s
tests (ubuntu-latest, tool, 3.8)	49s
tests (ubuntu-latest, tool, 3.12)	50s
tests (windows-2022, unit, 3.8)	2m 4s
tests (windows-2022, unit, 3.12)	2m 4s
tests (windows-2022, integration, 3.8)	3m 37s
tests (windows-2022, integration, 3.12)	3m 15s
tests (windows-2022, tool, 3.8)	3m 17s
tests (windows-2022, tool, 3.12)	4m 16s
coverage	15s
	27m 53s

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