Some of the rules in the file ext.securepoll.css appear unused since T271149: Convert SecurePoll CreatePage to use OOUI and T271150: Convert SecurePoll VoterEligibilityPage to use OOUI, and should have been removed while fixing those issues.
This task is for removing any unused rules:
- Check which pages load ext.securepoll.css
- Check which rules in ext.securepoll.css no longer apply to any elements on those pages
- Remove the unused rules