remove submodule vundle
Squashed 'vim/bundle/vundle/' content from commit f31aa52

git-subtree-dir: vim/bundle/vundle
git-subtree-split: f31aa52552ceb40240e56e475e6df89cc756507e
Merge commit '74c35f9802c1ca3ccd20b6bbef397907c512099f' as 'vim/bundle/vundle'