Remove URLs from excerpt

Hiya Bill,
is there a special way to remove URLs from the excerpts displayed with Display Posts?

Currently I’m trying to remove URLs this way, but to no avail:

function my_clean_excerpt($excerpt)
{
  $excerpt = preg_replace('~http(s)?://[^\s]*~i', '', $excerpt);
  $excerpt_length = apply_filters('excerpt_length', 20);
  $excerpt_more = apply_filters('excerpt_more', ' ' . '[…]');
  $excerpt = wp_trim_words($excerpt, $excerpt_length, $excerpt_more);

  return $excerpt;
}
add_filter('get_the_excerpt', 'my_clean_excerpt');

Any ideas would be great! Thanks