rm'd unkown attribute rule
rm'd unkown attribute rule

more info: https://github.com/scrooloose/syntastic/commit/a956a814323225f9fce873a14a3d8edc027b7aa5#commitcomment-4537304
wezhang/vim-setup,wezhang/vim-setup,wezhang/vim-setup,wezhang/vim-setup,wezhang/vim-setup,wezhang/vim-setup