In functions.php of a child theme look for:
2.4 – Tip10 – Add Twenty Thirteen search form to WordPress nav menu, also see style.css
And comment out or delete that function.
I finally just tried to do this…zapped my whole site, had to go in through file manager & delete them and start over. 🙁
I tested both regular and full width and the removal of function works as intended. If you do a change in functions.php and it gives you a whitescreen or errors, you do not delete whole theme, but go into your text editor, undo last change ,re-upload the file via ftp and bring the site back.
These lines had to be deleted or commented out:
function tinyframeworkchild_add_search_to_wp_menu ( $items, $args ) {
if( 'primary' === $args -> theme_location ) {
$items .= '<li class="menu-item menu-item-search">' . get_search_form(false) . '</li>';
}
return $items;
}
add_filter( 'wp_nav_menu_items','tinyframeworkchild_add_search_to_wp_menu',10,2 );