/**
  * This function is to delete role
  */
 public function deleteRole($role_id)
 {
     access_check('delete_role');
     $role = Roles::find($role_id);
     if ($role) {
         $roleObj = new Roles();
         $roleObj->where('rid', $role_id)->delete();
         Session::flash('success', 'Role deleted successfully.');
         return redirect()->back();
     } else {
         Session::flash('error', 'This Role not exist.');
         return redirect()->back();
     }
 }