clean up the environment (#16430)

content/en/docs/tasks/administer-cluster/manage-resources/cpu-default-namespace.md

@@ -155,6 +155,14 @@ Here are two of the restrictions that a resource quota imposes on a namespace:
 If a Container does not specify its own CPU limit, it is given the default limit, and then
 it can be allowed to run in a namespace that is restricted by a quota.
 
+## Clean up
+
+Delete your namespace:
+
+```shell
+kubectl delete namespace default-cpu-example
+```
+
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content/en/docs/tasks/administer-cluster/manage-resources/memory-default-namespace.md

@@ -162,6 +162,14 @@ Here are two of the restrictions that a resource quota imposes on a namespace:
 If a Container does not specify its own memory limit, it is given the default limit, and then
 it can be allowed to run in a namespace that is restricted by a quota.
 
+## Clean up
+
+Delete your namespace:
+
+```shell
+kubectl delete namespace default-mem-example
+```
+
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