Remove Gundo

lightline.vim

@@ -31,7 +31,7 @@ let g:lightline = {
 \ }
 
 function! Fugitive()
-  if &ft !~? 'gundo\|tagbar' && exists("*fugitive#head")
+  if &ft !~? 'tagbar' && exists("*fugitive#head")
     let _ = fugitive#head()
     return strlen(_) ? "μ "._ : ""
   endif
@@ -70,8 +70,6 @@ function! Mode()
   let fname = expand("%:t")
   return fname == "__Tagbar__" ? "Tagbar" :
         \ fname == "ControlP" ? "CtrlP" :
-        \ fname == "__Gundo__" ? "Gundo" :
-        \ fname == "__Gundo_Preview__" ? "Gundo Preview" :
         \ winwidth(0) > 60 ? lightline#mode() : ""
 endfunction
 

vimrc

@@ -79,7 +79,6 @@ map <C-j> <C-w><Down>
 map <C-l> <C-w><Right>
 map <C-h> <C-w><Left>
 
-map <F2> :GundoToggle<CR>
 map <F3> :call ToggleSpell()<CR>
 map <F5> :NERDTreeTabsToggle<CR>
 map <F6> :TagbarToggle<CR>
@@ -97,7 +96,6 @@ Plugin 'VundleVim/Vundle.vim'
 Plugin 'kien/ctrlp.vim'
 Plugin 'townk/vim-autoclose'
 Plugin 'tpope/vim-fugitive'
-Plugin 'sjl/gundo.vim'
 Plugin 'itchyny/lightline.vim'
 Plugin 'tpope/vim-markdown'
 Plugin 'ervandew/supertab'