How to hide the "Tags" select box in the Create New Ad page

I am not using tags with Classifieds and would like to hid the "Tags" select box in the form where you create a new ad. I tried setting hide_empty to 1 in page-my-classifieds.php in the table where this is created. But it is still showing up in the form.

<table class="cf-terms">
<tr>
<?php $taxonomies = get_object_taxonomies( 'classifieds', 'objects' ); ?>
<?php foreach ( $taxonomies as $taxonomy_name => $taxonomy_object ): ?>
<?php $terms = get_terms( $taxonomy_name, array( 'hide_empty' => 1 ) ); ?>
<td>
<select id="terms" name="terms[<?php echo $taxonomy_name; ?>][]" multiple="multiple">
<optgroup label="<?php echo $taxonomy_object->labels->name; ?>">
<?php foreach ( $terms as $term ): ?>
<option value="<?php echo $term->slug; ?>" <?php if ( isset( $_POST['terms'][$taxonomy_name] ) && is_array( $_POST['terms'][$taxonomy_name] ) && in_array( $term->slug, $_POST['terms'][$taxonomy_name] ) ) echo 'selected="selected"' ?>><?php echo $term->name; ?></option>
<?php endforeach; ?>
</optgroup>
</select>
</td>
<?php endforeach; ?>
</tr>
</table>

How do I hide this?

Thanks!