Fix: remove old imports used for debugging #113

Job	Run time
run-unit-tests (latest, ubuntu-latest, 3.9)	1m 11s
run-unit-tests (latest, ubuntu-latest, 3.10)	1m 37s
run-unit-tests (latest, ubuntu-latest, 3.11)	1m 32s
run-unit-tests (latest, ubuntu-latest, 3.12)	1m 20s
run-unit-tests (latest, macos-13, 3.9)	3m 15s
run-unit-tests (latest, macos-13, 3.10)	3m 36s
run-unit-tests (latest, macos-13, 3.11)	3m 40s
run-unit-tests (latest, macos-13, 3.12)	3m 35s
run-unit-tests (latest, macos-latest, 3.9)	1m 57s
run-unit-tests (latest, macos-latest, 3.10)	2m 8s
run-unit-tests (latest, macos-latest, 3.11)	1m 52s
run-unit-tests (latest, macos-latest, 3.12)	1m 51s
run-unit-tests (latest, windows-latest, 3.9)	4m 55s
run-unit-tests (latest, windows-latest, 3.10)	5m 46s
run-unit-tests (latest, windows-latest, 3.11)	5m 53s
run-unit-tests (latest, windows-latest, 3.12)	5m 7s
	49m 15s

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