How to remove a field from views output in Drupal 8

You can use hook_views_pre_render and change the value of the field in the following way. In this, I have removed field_image from 2nd row in the view. 

function your_module_views_pre_render(ViewExecutable $view) {
  if ($view->id() == "view_id") {
      foreach ($view->result as $key => $value) {
        if($key == 1 ) {
            $value->_entity->set('field_image', ['target_id' => 0]);
        }
      }
  }
}