Remove unwanted TinyMCE items from ACF Wysiwyg editor field toolbar (Wordpress)

functions.php

<?php

function acf_add_wysiwyg_toolbar($toolbars) {

  $toolbars['Bare'] = array();
  $toolbars['Bare'][1] = array('bold', 'italic', 'link', 'unlink', 'removeformat');
  return $toolbars;
}

add_filter('acf/fields/wysiwyg/toolbars', 'acf_add_wysiwyg_toolbar');