mypy

gh-146444: Remove legacy iOS folder (#147993) #20337

Job	Run time
Run mypy on Tools/build	18s
Run mypy on Lib/_pyrepl	20s
Run mypy on Lib/test/libregrtest	16s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/peg_generator	17s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Tools/cases_generator	16s
Run mypy on Tools/clinic	18s
Run mypy on Tools/jit	17s
	2m 37s

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