docs: Remove unused validation ClusterPolicy and use default example …

…output header string

Signed-off-by: Peter Fiddes <peter.fiddes@gmail.com>

content/docs/tutorials/certificate-defaults/README.md

@@ -185,7 +185,7 @@ These rules will:
     kubectl apply -f cert-test-revision.yaml --dry-run=server -o yaml | diff -uZ cert-test-revision.yaml -
     ```
 
-    The output should look similar to this:
+    This command should return some output similar to this example:
 
     ```shell
     --- cert-test-revision.yaml	2024-01-08 12:14:59.225074232 +0000
@@ -287,7 +287,7 @@ In our example `ClusterPolicy` we will do two things:
     kubectl get cpol
     ```
 
-    Example:
+    This command should return some output similar to this example:
 
     ```shell
     NAME                            ADMISSION   BACKGROUND   VALIDATE ACTION   READY   AGE    MESSAGE
@@ -317,7 +317,7 @@ In our example `ClusterPolicy` we will do two things:
     kubectl apply -f cert-test-minimal.yaml --dry-run=server -o yaml | diff -uZ cert-test-minimal.yaml -
     ```
 
-    The output of this command should result in something similar to:
+    This command should return some output similar to this example:
 
     ```yaml
     --- cert-test-minimal.yaml	2024-01-05 14:45:07.140668401 +0000
@@ -414,7 +414,7 @@ Let's see how we can still use `ClusterPolicy` to apply our defaults in this use
     kubectl get cert defaults-example-certificate-tls -o yaml | yq
     ```
 
-    Example output:
+    This command should return some output similar to this example:
 
     ```yaml
     apiVersion: cert-manager.io/v1
@@ -472,7 +472,7 @@ Let's see how we can still use `ClusterPolicy` to apply our defaults in this use
     kubectl logs -n kyverno-system $(kubectl get pod -n kyverno-system -l app.kubernetes.io/component=admission-controller -o jsonpath='{.items[0].metadata.name}') -c kyverno --tail 5
     ```
 
-    Example logs would look like:
+    This command should return some output similar to this example:
 
     ```log
     I0109 10:43:43.554872       1 event_broadcaster.go:318] "Event occurred" object="0-mutate-certificate-defaults" kind="ClusterPolicy" apiVersion="kyverno.io/v1" type="Normal" reason="PolicyApplied" action="Resource Mutated" note="Certificate default/defaults-example-certificate-tls is successfully mutated"