security: fix oobe-flow reuse when akadmin is deleted (#7361)

Signed-off-by: Jens Langhammer <jens@goauthentik.io>
# Conflicts:
#	website/docs/releases/2023/v2023.10.md

blueprints/system/bootstrap.yaml

@@ -42,9 +42,3 @@ entries:
       user: !KeyOf admin-user
     attrs:
       key: !Context token
-  - model: authentik_blueprints.blueprintinstance
-    identifiers:
-      metadata:
-        labels:
-          blueprints.goauthentik.io/system-bootstrap: "true"
-    state: absent