remove cmake-modules submodule
Squashed 'cmake-modules/' content from commit f77873d

git-subtree-dir: cmake-modules
git-subtree-split: f77873dbcc00df3dedb434a85acb4865b1cc284b
Merge commit '788ab28e498aee513b95142996cb6cdb1c1c2098' as 'cmake-modules'