Steps to replicate the issue:

• The category https://wikitech.wikimedia.org/wiki/Category:Pages_with_script_errors contains 2 pages
  • https://wikitech.wikimedia.org/wiki/Template:Portal_list_item
  • https://wikitech.wikimedia.org/wiki/Template:Portal_list_item_noimage
• I cannot determine why these pages are showing up in the list
• The pages themselves do not list the category, (nor do the transcluded /doc pages), and it's not a hidden category
• I tried purging the cache (hard-refresh, action=purge, and API-purge) without any change.

Please help us to empty this category, and to determine if there is a bigger problem underlying it.