mypy

Remove file accidentally added to `Doc/` (#142563) #18422

Job	Run time
Run mypy on Lib/test/libregrtest	19s
Run mypy on Tools/build	20s
Run mypy on Tools/cases_generator	16s
Run mypy on Tools/clinic	17s
Run mypy on Tools/peg_generator	19s
Run mypy on Lib/tomllib	18s
Run mypy on Tools/jit	21s
Run mypy on Lib/_pyrepl	17s
	2m 27s

Provide feedback