Remove obsolete tandoor middleware

apps/tandoor/app/route.yaml

@@ -9,16 +9,6 @@ spec:
       X-Forwarded-Proto: https
 ---
 apiVersion: traefik.containo.us/v1alpha1
-kind: Middleware
-metadata:
-  name: tandoor-identity
-  namespace: tandoor
-spec:
-  headers:
-    customResponseHeaders:
-      X-Hello: world
----
-apiVersion: traefik.containo.us/v1alpha1
 kind: IngressRoute
 metadata:
   name: recipes-route