Remove orphan CSS selectors in config/config-options.css
Summary:
* `config-options-current-value`
** Added in https://we.phorge.it/rP25ca17da46348d974ffa9bc451a0a81ed6babbcf, usage removed in https://we.phorge.it/rP530145ba3be62b6c54b8f3bc8aca09f2f369697d by deleting `src/applications/config/controller/PhabricatorConfigGroupController.php`
Test Plan: Grep the code for each CSS selector (`grep --exclude="*.css" -R 'some-search-string' .`), also do partial searches, get no results.
Reviewers: O1 Blessed Committers, valerio.bozzolan
Reviewed By: O1 Blessed Committers, valerio.bozzolan
Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Differential Revision: https://we.phorge.it/D26002