02 9 / 2010
Stylesheets can’t remove CSS files via theme.info anymore in Drupal 7
UPDATE: The original issue has been fixed. However, there is still a bug that allows these stylesheets to come back when content is rendered via AJAX.: http://drupal.org/node/967166
This video demonstrates the Drupal 7 issue outlined here: http://drupal.org/node/901062. Please comment in the issue if you want to see this fixed. Posting here wont help.