Update testing notes (950.md)

The #8372 PR introduced a regression for the #8251 PR

To avoid confusion we are removing it from the testing notes

docs/internal-developers/testing/releases/950.md

@@ -149,13 +149,6 @@ Zip file for testing: [woocommerce-gutenberg-products-block.zip](https://github.
 </tr>
 </table>
 
-### Fix Catalog Sorting colors in dark themes ([8270](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/8270))
-
-1. Install a theme with a dark background (ie: theme TT3 with Auberginie style or theme Zaino).
-2. Go to `Appearance » Editor` and edit the Product Catalog template.
-3. Add the `Catalog Sorting` blocks.
-4. Make sure it's legible.
-
 ### Set inherit setting to true when is inserted in the archive product template ([8251](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/8251))
 
 1. Make sure you are using a block theme.