Remove 'guioptions' workaround

autoload/fugitive.vim

@@ -3246,11 +3246,6 @@ function! s:CommitSubcommand(line1, line2, range, bang, mods, args, ...) abort
   let msgfile = fugitive#Find('.git/COMMIT_EDITMSG', dir)
   let outfile = tempname()
   try
-    let guioptions = &guioptions
-    try
-      if &guioptions =~# '!'
-        setglobal guioptions-=!
-      endif
     if s:winshell()
       let command = 'set GIT_EDITOR=false& '
     else
@@ -3278,9 +3273,6 @@ function! s:CommitSubcommand(line1, line2, range, bang, mods, args, ...) abort
       let [error_string, exec_error] = s:TempCmd(outfile, command)
       let errors = split(error_string, "\n")
     endif
-    finally
-      let &guioptions = guioptions
-    endtry
     if !has('gui_running')
       redraw!
     endif