Remove Plain Text Dropdown

For email newsletter signup on the registration page, is there a way to disable the plain text/html box? I think dev could deprecate this field.

edit template:

skins\yourskinname\customer\addons\news_and_emails\hooks\profiles\account_update.pre.tpl



Replace this:

```php

{$lang.txt_format}
{$lang.html_format}

```
Replace with this:
```php
```