Remove NeoBundle check

Well that was short-lived.

`:NeoBundleDepends` [was removed](Shougo/neobundle.vim@7e644cd), leaving me uncertain as to how to declare a dependency within a plugin. I think we may need to fork [neobundle-vim-recipes](https://github.com/Shougo/neobundle-vim-recipes) and add a recipe instead, but I'm currently unable to get recipe functionality working (Windows box, curl issues, etc.).

Author: shkm

plugin/textobj/rubyblock.vim

@@ -2,10 +2,6 @@ if exists('g:loaded_textobj_rubyblock')  "{{{1
   finish
 endif
 
-if exists(':NeoBundleDepends')
-  NeoBundleDepends 'kana/vim-textobj-user'
-endif
-
 " Interface  "{{{1
 call textobj#user#plugin('rubyblock', {
 \      '-': {