chore: drop `as _annotations` #4052

Job	Run time
checks / readme-snippets	12s
checks / pre-commit	35s
checks / test (3.10, lowest-direct, ubuntu-latest)	46s
checks / test (3.11, lowest-direct, windows-latest)	2m 35s
checks / test (3.10, highest, ubuntu-latest)	48s
checks / test (3.13, highest, ubuntu-latest)	47s
checks / test (3.14, lowest-direct, windows-latest)	2m 17s
checks / test (3.13, lowest-direct, ubuntu-latest)	45s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.13, lowest-direct, windows-latest)	2m 26s
checks / test (3.12, highest, ubuntu-latest)	55s
checks / test (3.11, highest, ubuntu-latest)	54s
checks / test (3.10, lowest-direct, windows-latest)	2m 41s
checks / test (3.12, lowest-direct, windows-latest)	3m 25s
checks / test (3.10, highest, windows-latest)	2m 30s
checks / test (3.14, highest, windows-latest)	2m 26s
checks / test (3.11, lowest-direct, ubuntu-latest)	48s
checks / test (3.12, highest, windows-latest)	4m 6s
checks / test (3.12, lowest-direct, ubuntu-latest)	58s
checks / test (3.14, highest, ubuntu-latest)	1m 14s
checks / test (3.13, highest, windows-latest)	2m 32s
checks / test (3.11, highest, windows-latest)	3m 8s
	37m 58s

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