Update vim8 configuration

vim8.md

@@ -38,8 +38,8 @@ call vundle#begin()
 
 Plugin 'VundleVim/Vundle.vim'
 Plugin 'tpope/vim-fugitive'
-Plugin 'Shougo/Denite.nvim'
-Plugin 'Valloric/YouCompleteMe'
+Plugin 'scrooloose/nerdtree'
+Plugin 'ycm-core/YouCompleteMe'
 
 call vundle#end()
 filetype plugin indent on
@@ -65,19 +65,5 @@ sudo apt install build-essential cmake python-dev
 
 # clone from github repositories and install python, go, and javascript completion
 cd $HOME/.vim/bundle/YouCompleteMe
-./install.py --go-completer --js-completer
-
-# for javascript autocompletion
-cd $HOME/.vim/bundle/YouCompleteMe/third_party/ycmd/third_party/tern_runtime
-npm install --production
-cat << EOF > $HOME/.tern-config
-{
-    "libs" : [
-        "browser"
-    ]
-    "plugins": {
-        "node": {}
-    }
-}
-EOF
+./install.py --go-completer --ts-completer --clang-completer
 ```