Since some css was loaded twice, when parsing rules, we grouped similar rules in order to minimize the amount of rules on which to iterate during conversion, so as to improve performance. This is not needed anymore now css is loaded only once, so we can remove this extra processing. X-original-commit: 3db6f4a345015adf99c2a744066dcdf8f076a657 Part-of: odoo/odoo#84513 Co-authored-by: Antoine Guenet <age@odoo.com> Co-authored-by: Nicolas Bayet <nby@odoo.com>