Added docs for delete --all command

site/content/en/docs/Examples/_index.md

@@ -39,3 +39,7 @@ Stop your local cluster:
 Delete your local cluster:
 
 `minikube delete`
+
+Delete all local clusters and profiles
+
+`minikube delete --all`

site/content/en/docs/Reference/Commands/delete.md

@@ -18,6 +18,12 @@ associated files.
 minikube delete [flags]
 ```
 
+## Options
+
+```
+      --all                              Delete all profiles and clusters
+```
+
 ### Options inherited from parent commands
 
 ```