Create uninstall.md

docs/saltbox/install/uninstall.md

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+# Uninstall
+
+There is no "uninstall" available.  To uninstall Saltbox entirely, you will need to wipe the machine and reinstall the OS.  You can remove all the containers, services, data, and the like, but there is no tracking of applications and packages that are installed in the OS.
+
+## Step 1: Reinstall the OS
+
+!!! warning
+    This will delete all data on your server.  There is no undo.
+
+Boot the computer from the install media of the OS of your choice.
+
+Follow the prompts through the install.
+
+## Step 2: There is no step 2