organize series plugin widget hide in post option

/* Coded by Md Abul Bashar
Main Post link: http://www.pchelpcenterbd.com/wordpress-plugin-download-12758
*/

function wp_admin_style_seric_hide() { ?>
<style type="text/css">
#seriesdiv {
  display: none;
}
</style>
<?php }

add_action( 'admin_head', 'wp_admin_style_seric_hide' );