remove vundle submodule
Squashed 'bundle/vundle/' content from commit 08e9894

git-subtree-dir: bundle/vundle
git-subtree-split: 08e9894d2a9452537663f09a73ddeb4e647e9c4c
Merge commit '3f1c6b7df9850ce3a305bc6060108f4000278544' as 'bundle/vundle'