Remove redundant SDL version check from setup.py #1168

Job	Run time
ruff	7s
mypy	28s
sdist	2m 21s
parse_sdl (windows-latest, 3.2.16)	43s
parse_sdl (macos-latest, 3.2.16)	21s
test-docs	5m 3s
tox (ubuntu-latest)	3m 32s
build (ubuntu-latest, pypy-3.10, x64)	5m 18s
build (windows-latest, 3.10, x64)	3m 2s
build (windows-latest, pypy-3.10, x86)	4m 42s
build (windows-latest, 3.10, x86)	4m 23s
build (windows-latest, pypy-3.10, x64)	4m 44s
build (ubuntu-latest, 3.10, x64)	6m 1s
build-macos (cp310-*_universal2)	2m 37s
linux-wheels (x86_64, pp310-manylinux*)	3m 23s
build-macos (pp310-*)	3m 45s
linux-wheels (aarch64, cp310-manylinux*)	4m 4s
linux-wheels (x86_64, cp310-manylinux*)	4m 8s
pyodide	4m 25s
linux-wheels (aarch64, pp310-manylinux*)	3m 31s
publish	0s
	1h 6m 38s

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