Remove redundant SDL version check from setup.py #1180

Job	Run time
ruff	9s
mypy	26s
sdist	2m 21s
parse_sdl (windows-latest, 3.2.16)	39s
parse_sdl (macos-latest, 3.2.16)	21s
test-docs	3m 21s
tox (ubuntu-latest)	3m 39s
build (ubuntu-latest, 3.10, x64)	6m 6s
build (windows-latest, pypy-3.10, x64)	4m 16s
build (ubuntu-latest, pypy-3.10, x64)	5m 21s
build (windows-latest, 3.10, x64)	3m 31s
build (windows-latest, 3.10, x86)	3m 54s
build (windows-latest, pypy-3.10, x86)	4m 27s
linux-wheels (x86_64, cp310-manylinux*)	4m 1s
linux-wheels (x86_64, pp310-manylinux*)	3m 29s
build-macos (cp310-*_universal2)	1m 52s
linux-wheels (aarch64, cp310-manylinux*)	4m 2s
linux-wheels (aarch64, pp310-manylinux*)	3m 54s
build-macos (pp310-*)	7m 5s
pyodide	4m 18s
publish	0s
	1h 7m 12s

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