cannot remove search field from twentytwelve child themes nav menu

hi, my code in header.php is:

<nav id="site-navigation" class="main-navigation" role="navigation">
			<h3 class="menu-toggle"><?php _e( 'Menu', 'twentytwelve' ); ?></h3>
			<a href="#content">"><?php _e( 'Skip to content', 'twentytwelve' ); ?></a>
			<?php wp_nav_menu( array( 'theme_location' => 'primary', 'menu_class' => 'nav-menu' ) ); ?>

</nav><!-- #site-navigation -->

there is no: get_search_form in the whole file, but the search form still appears in the <nav> section as the last
<li> element.

in fact I do not want to remove the searchfield but to move on another place, not to appear in the navbar.

thank you