chore: drop `as _annotations` #4053

Job	Run time
checks / pre-commit	28s
checks / readme-snippets	14s
checks / test (3.11, lowest-direct, windows-latest)	3m 4s
checks / test (3.10, lowest-direct, windows-latest)	2m 31s
checks / test (3.12, highest, ubuntu-latest)	52s
checks / test (3.11, lowest-direct, ubuntu-latest)	46s
checks / test (3.10, highest, windows-latest)	2m 30s
checks / test (3.10, lowest-direct, ubuntu-latest)	51s
checks / test (3.13, lowest-direct, windows-latest)	2m 29s
checks / test (3.11, highest, ubuntu-latest)	44s
checks / test (3.13, lowest-direct, ubuntu-latest)	46s
checks / test (3.12, lowest-direct, windows-latest)	3m 20s
checks / test (3.12, highest, windows-latest)	4m 20s
checks / test (3.11, highest, windows-latest)	2m 31s
checks / test (3.14, highest, windows-latest)	2m 24s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 11s
checks / test (3.14, highest, ubuntu-latest)	1m 8s
checks / test (3.12, lowest-direct, ubuntu-latest)	53s
checks / test (3.13, highest, ubuntu-latest)	43s
checks / test (3.13, highest, windows-latest)	2m 32s
checks / test (3.14, lowest-direct, windows-latest)	2m 30s
checks / test (3.10, highest, ubuntu-latest)	51s
	37m 38s

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