Remove reference to php file from 8857 instructions

Author: opr

docs/internal-developers/testing/releases/1000.md

@@ -186,7 +186,7 @@ These test cases show how to trigger the new notices during certain activities.
 2. Go to Appearance > Editor > Single Product Template.
 3. Make sure the “Product Reviews” block appears in the inserter and add it.
 4. Make sure a placeholder appears in the editor and save.
-5. Go to the front end and make sure that the reviews are correctly shown as per the provided `single_products_reviews.php` template file.
+5. Go to the front end and make sure that the reviews are correctly shown.
 
 ### Fix duplicated Shipping method Block on the front-end ([8861](https://github.com/woocommerce/woocommerce-blocks/pull/8861))