remove go and powerline submodules dirs

	deleted:    bundle/go-vim
	deleted:    bundle/powerline
bundles!
	modified:   .gitmodules
	modified:   bundle/Dockerfile
	new file:   bundle/ag.vim
	modified:   bundle/git
	modified:   bundle/haml
	modified:   bundle/html5
	modified:   bundle/less
	modified:   bundle/nerdcommenter
	modified:   bundle/nerdtree
	modified:   bundle/rails
	modified:   bundle/ruby
	new file:   bundle/rust
	modified:   bundle/surround
	modified:   bundle/vim-gitgutter
	modified:   bundle/vim-ls
	modified:   bundle/vim-markdown
	modified:   colors/ir_black.vim