Remove redundant SDL version check from setup.py #1179

Job	Run time
mypy	30s
ruff	6s
sdist	2m 19s
parse_sdl (windows-latest, 3.2.16)	39s
parse_sdl (macos-latest, 3.2.16)	29s
build-macos (cp310-*_universal2)	1m 48s
build-macos (pp310-*)	3m 49s
pyodide	4m 19s
build (windows-latest, 3.10, x64)	3m 25s
test-docs	3m 34s
build (windows-latest, pypy-3.10, x64)	3m 42s
build (windows-latest, 3.10, x86)	4m 28s
build (ubuntu-latest, pypy-3.10, x64)	5m 33s
build (ubuntu-latest, 3.10, x64)	6m 13s
linux-wheels (x86_64, cp310-manylinux*)	4m 10s
build (windows-latest, pypy-3.10, x86)	4m 43s
linux-wheels (aarch64, cp310-manylinux*)	4m 16s
linux-wheels (x86_64, pp310-manylinux*)	3m 24s
linux-wheels (aarch64, pp310-manylinux*)	3m 44s
tox (ubuntu-latest)	3m 45s
publish	0s
	1h 4m 56s

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