/**
  * @param integer $id
  *
  * @return \Illuminate\Http\RedirectResponse
  */
 public function delete($id)
 {
     $bulletin = Bulletin::find($id);
     $response = redirect()->route('bulletins.list');
     if ($bulletin) {
         $bulletin->delete();
         $bulletin->with('message', 'Bulletin has been deleted sucessfully');
     } else {
         $bulletin->with('message', 'Invalid bulletin.');
     }
     return $response;
 }