Remove fix from the testing instructions

Author: albarin

docs/internal-developers/testing/releases/810.md

@@ -44,15 +44,6 @@ For each filter block (by Price, by Attribute, by Stock and Active filters) ensu
 4. Return to the page with your Featured Product block, select it, and select "Edit" to choose a new product to feature.
 5. Make sure the block can still be edited to choose a new product.
 
-### Fix: Update billing address when shipping address gets change in Cart block. ([6591](https://github.com/woocommerce/woocommerce-blocks/pull/6591))
-
-1. Add a product to cart and go to the Cart block
-2. Add a new address in the Shipping calculator, different from what you already used
-3. Wait for the update and click Proceed to checkout
-4. In the Checkout block, see the new address for shipping being added to the Shipping address
-5. Uncheck the checkbox for Use same address for billing
-6. Look at the Billing address form and confirm it has the same address which was selected in shipping calculator.
-
 ### Contrast improvement for checkout error messages when displayed over a theme's dark mode. ([6292](https://github.com/woocommerce/woocommerce-blocks/pull/6292))
 
 1. Use a theme that supports dark mode and enable it, e.g. Eksell.