tests

Remove py38 compat modules #1252

Job	Run time
test_cygwin (39, windows-latest)	1m 20s
test (3.9, ubuntu-latest)	54s
ci_setuptools (3.10, ubuntu-latest)	1m 36s
test (3.9, macos-latest)	1m 16s
collateral (diffcov)	1m 7s
test_msvc_python_mingw	1m 19s
test (3.9, windows-latest)	1m 17s
collateral (docs)	29s
test (3.13, ubuntu-latest)	56s
test_msys2_mingw (mingw64, x86_64, gcc, g++)	1m 24s
test (3.13, macos-latest)	44s
test_msys2_mingw (mingw32, i686, gcc, g++)	1m 23s
test (3.13, windows-latest)	1m 18s
test_msys2_mingw (ucrt64, ucrt-x86_64, gcc, g++)	1m 26s
test (3.10, ubuntu-latest)	43s
test_msys2_mingw (clang64, clang-x86_64, clang, clang++)	1m 26s
test (3.11, ubuntu-latest)	41s
test (3.12, ubuntu-latest)	46s
test (3.14, ubuntu-latest)	58s
test (pypy3.10, ubuntu-latest)	1m 34s
check	2s
release	1s
	22m 40s

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