Remove fieldset and add class to paragraph

Author: sabernhardt

src/wp-admin/options-permalink.php

@@ -409,9 +409,8 @@ class="button button-secondary"
 </tbody>
 </table>
 
-<fieldset class="permalink-structure-optional" aria-describedby="permalink-structure-optional-description">
-<legend><h2 class="title"><?php _e( 'Optional' ); ?></h2></legend>
-<p id="permalink-structure-optional-description">
+<h2 class="title"><?php _e( 'Optional' ); ?></h2>
+<p class="permalink-structure-optional-description">
 <?php
 printf(
 	/* translators: %s: Placeholder that must come at the start of the URL. */
@@ -464,7 +463,6 @@ class="button button-secondary"
 	</tr>
 	<?php do_settings_fields( 'permalink', 'optional' ); ?>
 </table>
-</fieldset>
 
 <?php do_settings_sections( 'permalink' ); ?>