fix: don't request cmake when building even if not present (#480)

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

pyproject.toml

@@ -49,6 +49,7 @@ ctest = "cmake:ctest"
 [tool.scikit-build]
 minimum-version = "0.8"
 build-dir = "build/{wheel_tag}"
+cmake.version = ""  # We are cmake, so don't request cmake
 ninja.make-fallback = false
 wheel.py-api = "py3"
 wheel.expand-macos-universal-tags = true