Support fields without a wrapping <form>

Hi @dakwamine

Your request seems doable, however ther is I think easier way to remove submit than removing form wrapper. You can remove the submit button itself. For example:

function MYMODULE_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
  if ($form_id === 'node_page_form') {
    unset($form['actions']['submit']);
    unset($form['actions']['preview']);
  }
}

The solution suggested by @salmonek should resolve the issue. We don't plan to cover this edge case in the module itself for the time being, unless there will be more requests from the community.