Maarten de Vries authored Sep 15, 2017 and Brad King committed Sep 18, 2017

An update from vim-cmake-syntax by commit v3.9.0-rc1~167^2^2
(vim-cmake-syntax 2017-05-02, 2017-05-02) brought in a change to set
`expandtab` in CMake language files.  This should be a per-project or
per-user choice instead, so drop the setting.