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Fix: Remove five unused variables #4656

Job	Run time
checks / readme-snippets	14s
checks / pre-commit	51s
checks / docs	1m 47s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 29s
checks / test (3.11, locked, windows-latest)	2m 1s
checks / test (3.15, locked, windows-latest)	2m 14s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 26s
checks / test (3.13, locked, windows-latest)	2m 21s
checks / test (3.14, locked, windows-latest)	1m 30s
checks / test (3.11, lowest-direct, windows-latest)	2m 16s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 25s
checks / test (3.13, lowest-direct, windows-latest)	1m 35s
checks / test (3.11, locked, ubuntu-latest)	1m 36s
checks / test (3.14, lowest-direct, windows-latest)	1m 43s
checks / test (3.12, locked, ubuntu-latest)	1m 36s
checks / test (3.12, lowest-direct, windows-latest)	1m 27s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 14s
checks / test (3.12, locked, windows-latest)	2m 26s
checks / test (3.15, locked, ubuntu-latest)	1m 10s
checks / test (3.14, locked, ubuntu-latest)	1m 19s
checks / test (3.15, lowest-direct, windows-latest)	2m 14s
checks / test (3.15, lowest-direct, ubuntu-latest)	1m 3s
checks / test (3.13, locked, ubuntu-latest)	1m 29s
all-green	3s
	36m 29s