Remove testing steps for 4005

The error no longer appears as it was fixed in 4013 and to force an error would be difficult to do for other testers

Author: ralucaStan

docs/testing/releases/480.md

@@ -34,27 +34,6 @@ The changes here implement any payment method type processing, so it's important
 4. Proceed to checkout (you should be using the checkout _block_) and try to complete the order without changing any address fields. (You may need to fill the missing required fields)
 5. Make sure you are able to submit the order without validation errors for address fields
 
-### Prevent error messages returned by the API from displaying raw HTML (#4005)
-
-**You will need WooCommerce Shipping and Tax set up and linked to your WPCOM account. If you don't have this, then you can test on _my_ local site using my ngrok tunnel. Just message me when you're ready to test.**
-
-1. Enable WooCommerce Shipping and Tax
-2. Go to the shortcode cart.
-3. Use the shipping calculator, select United States as your country, but leave ZIP code empty.
-4. Proceed to checkout.
-5. Fill in all fields, including ZIP code.
-6. See error.
-
-#### Screenshots
-
-##### Before
-
-![image](https://user-images.githubusercontent.com/5656702/112754817-c15f8200-8fd5-11eb-9124-682ff4e5160f.png)
-
-##### After
-
-![image](https://user-images.githubusercontent.com/5656702/112754832-d9cf9c80-8fd5-11eb-8221-fd7ec34d15ad.png)
-
 ### Fix the Proceed to checkout button click bug happening when the Coupon error is visible in the Cart block. (#3996)
 
 -   Add any product to the Cart and go to the Cart block.