mypy

gh-150116 Remove dead try/except in `asyncio.Lock._wake_up_first` (#1… #21508

Job	Run time
Run mypy on Tools/build	13s
Run mypy on Tools/cases_generator	20s
Run mypy on Lib/_pyrepl	14s
Run mypy on Lib/test/libregrtest	14s
Run mypy on Tools/check-c-api-docs	24s
Run mypy on Lib/tomllib	18s
Run mypy on Tools/clinic	17s
Run mypy on Tools/peg_generator	30s
Run mypy on Tools/jit	21s
	2m 51s

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