unlink() doesn’t delete the uploaded file

I figured it out! the problem is the path is not right! Thanks to this post : Alow users to delete uploaded images inside backend?

this function below helped :

 function url_to_path_test($url){
    $url=str_replace(rtrim(get_site_url(),"https://wordpress.stackexchange.com/")."https://wordpress.stackexchange.com/", ABSPATH, $url);
   return $url;

So in my code if you change the remove previous image like this it will work :

  //remove previous uploaded file
  $author_profile_photo = get_author_profile_photo($user_id);
  $url=str_replace(rtrim(get_site_url(),"https://wordpress.stackexchange.com/")."https://wordpress.stackexchange.com/", ABSPATH, $author_profile_photo["file"]);