Remover Imagem Destacada [Apenas dentro do Post]

Queria tirar a imagem de destaque do post, mas quero que apareça na pagina inicial. deixo o code em baixo para quem me puder ajudar.

Blog: http://taporreiropah.com/

/***** Featured Image on Posts *****/

if (!function_exists(‘mh_featured_image’)) {
function mh_featured_image() {
global $post;
if (has_post_thumbnail() && !is_attachment()) {
$thumbnail = wp_get_attachment_image_src(get_post_thumbnail_id(), ‘content’);
echo “\n” . ‘<div class=”post-thumbnail”>’ . “\n”;
echo ‘<img src=”‘ . esc_url($thumbnail[0]) . ‘” alt=”‘ . esc_attr(get_post_meta(get_post_thumbnail_id(), ‘_wp_attachment_image_alt’, true)) . ‘” title=”‘ . esc_attr(get_post(get_post_thumbnail_id())->post_title) . ‘” />’ . “\n”;
if (get_post(get_post_thumbnail_id())->post_excerpt) {
echo ‘<span class=”wp-caption-text”>’ . wp_kses_post(get_post(get_post_thumbnail_id())->post_excerpt) . ‘</span>’ . “\n”;
}
echo ‘</div>’ . “\n”;
}
}
}