This improvement removes unnecessary attribute parameters from product URLs when a product has no variants. Previously, product URLs would display with empty attribute markers (e.g., /shop/product-1#attr=), which looked unprofessional. Now, simple products without variants will have clean, straightforward URLs (e.g., /shop/product-1), improving the appearance and user experience of your eCommerce store.

Description of the issue/feature this PR addresses:
Avoid ugly URL if no variant on your eCommerce.

Current behavior before PR:
Product URL are like /shop/product-1#attr=

Desired behavior after PR is merged:
Product URL are like /shop/product-1 when no attributes



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