tests

Remove py38 compat modules #1250

Job	Run time
collateral (diffcov)	51s
ci_setuptools (3.10, ubuntu-latest)	4m 17s
test (3.9, ubuntu-latest)	43s
collateral (docs)	30s
test_cygwin (39, windows-latest)	4m 54s
test (3.9, macos-latest)	1m 2s
test_msvc_python_mingw	2m 6s
test_msys2_mingw (mingw64, x86_64, gcc, g++)	1m 42s
test (3.9, windows-latest)	1m 52s
test_msys2_mingw (mingw32, i686, gcc, g++)	2m 0s
test (3.13, ubuntu-latest)	54s
test (3.13, macos-latest)	58s
test_msys2_mingw (ucrt64, ucrt-x86_64, gcc, g++)	1m 38s
test (3.13, windows-latest)	3m 11s
test_msys2_mingw (clang64, clang-x86_64, clang, clang++)	2m 1s
test (3.10, ubuntu-latest)	45s
test (3.11, ubuntu-latest)	40s
test (3.12, ubuntu-latest)	51s
test (3.14, ubuntu-latest)	58s
test (pypy3.10, ubuntu-latest)	1m 41s
check	1s
release	0s
	33m 35s

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