hide fields ttshowcase

add_action('admin_footer', 'custom_testimonials_admin_styles');
function custom_testimonials_admin_styles() {
    echo '
    <style>

    .post-type-ttshowcase #aditional_info > div > table > tbody > tr:nth-child(3),
    .post-type-ttshowcase #aditional_info > div > table > tbody > tr:nth-child(4),
    .post-type-ttshowcase #aditional_info > div > table > tbody > tr:nth-child(5),
    .post-type-ttshowcase #aditional_info > div > table > tbody > tr:nth-child(9),
    .post-type-ttshowcase #aditional_info > div > table > tbody > tr:nth-child(10),
    .post-type-ttshowcase #aditional_info > div > table > tbody > tr:nth-child(11),
    .post-type-ttshowcase #aditional_info > div > table > tbody > tr:nth-child(12) {
        display:none;
    }
   .post-type-ttshowcase .page-title-action { display:none; }

    </style>';
}