Uninstalling OrderSync for Trello
To uninstall OrderSync for Trello, please open the 'Apps' section of your Shopify admin, and click Delete next to OrderSync for Trello. Your subscription will be canceled automatically. You may see a charge on your next Shopify invoice covering the current billing period, but no more charges will be created.
We don't add any code to your theme, so there's nothing left to do. No data will be deleted from Trello, but future orders won't be synced.