mypy

gh-142207: remove assertions incompatible under `profiling.sampling` … #18332

Job	Run time
Run mypy on Lib/_pyrepl	18s
Run mypy on Lib/tomllib	15s
Run mypy on Lib/test/libregrtest	16s
Run mypy on Tools/build	18s
Run mypy on Tools/peg_generator	19s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/jit	18s
Run mypy on Tools/clinic	17s
	2m 19s

Provide feedback