Exclude a .js file on certain Drupal 6 paths
I think that this module spits out the reference to the JS file inline in the content.  If this is true, then I would use some logic inside template_preprocess_page to determine whether you are on an HTTPS path, and then search/replace $vars["content"] and remove the string.  You may also be able to use template_preprocess_comment_wrapper to do the same thing.

This solution is pretty hackish, but I think it may be your only solution short of patching the module.