Replaced nerdtree with inbuilt file explorer

plugins.vim

@@ -15,7 +15,6 @@ Plugin 'itchyny/lightline.vim'
 "Plug 'morhetz/gruvbox'
 " Functional
 Plugin 'jiangmiao/auto-pairs'
-Plugin 'scrooloose/nerdtree'
 Plugin 'tpope/vim-surround'
 Plugin 'dhruvasagar/vim-dotoo'
 " Language C++/glsl
@@ -41,8 +40,6 @@ filetype plugin indent on    " required
 " see :h vundle for more details or wiki for FAQ
 " Put your non-Plugin stuff after this line
 
-" NerdTree
-nnoremap <C-o> :NERDTreeToggle<CR>
 " Tab completion
 inoremap <expr> <Tab>   pumvisible() ? "\<C-n>" : "\<Tab>"
 inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"

vimrc

@@ -90,5 +90,7 @@ hi CursorLine ctermbg=8 guibg=#404040
 hi Cursor ctermbg=15 
 " set spellcheck
 set spell
+" Remap Lex
+nnoremap <C-o> :Lex<CR>
 " Load Plugins
 so ~/.vim/plugins.vim