Remove stubs no longer in typeshed #14333

Job	Run time
Test mypyc suite with 32-bit Python	7m 14s
Test suite with py39-ubuntu, mypyc-compiled	18m 44s
Test suite with py39-windows-64	21m 23s
Test suite with py310-ubuntu	18m 8s
Test suite with py311-ubuntu, mypyc-compiled	16m 16s
Test suite with py312-ubuntu, mypyc-compiled	19m 1s
Test suite with py313-ubuntu, mypyc-compiled	18m 24s
mypyc runtime tests with py39-macos	4m 19s
Type check our own code (py39-ubuntu)	1m 48s
Type check our own code (py39-windows-64)	2m 29s
Formatting and code style with Black + ruff	1m 2s
	2h 8m 48s

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