<?php

add_filter('acf/fields/wysiwyg/toolbars', function ($toolbars) {
  $toolbars['Without align'] = [];
  
  $toolbars['Without align'][1] =  [
    'formatselect', 'bold', 'italic', 'underline', 'strikethrough',
    'bullist', 'numlist', 'blockquote',
    'link',
    'undo', 'redo'
];

  return $toolbars;
});