fix(k8s): new image system (#5502)

Removed instructions for creating a new pool with new images since all new pools are automatically created with new images enabled.

Author: pablo-ruth

pages/kubernetes/how-to/upgrade-kapsule-new-node-image-system.mdx

@@ -50,7 +50,3 @@ Example of commands:
     ```
     scw k8s pool migrate-to-new-images cluster-id=11111111-1111-1111-1111-111111111111 pools.0=22222222-2222-2222-2222-222222222222
     ```
-* Create a new pool that uses the new images:
-    ```
-    scw k8s cluster create name=foo pools.0.name=bar pools.0.tags.0=scw-compute-image pools.0.size=1 pools.0.node-type=GP1-M
-    ```