Remove erroneous backend protocol for keycloak ingress

Author: jb3

kubernetes/namespaces/tooling/keycloak/ingress.yaml

@@ -107,7 +107,6 @@ metadata:
     # spot at two psychiatric hospitals at the same time, for high
     # availability. Thank you, Kubernetes, for solving this problem.
     nginx.ingress.kubernetes.io/auth-tls-error-page: "https://maintenance.python-discord.workers.dev/"
-    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
     nginx.ingress.kubernetes.io/proxy-buffers-number: "4"
     nginx.ingress.kubernetes.io/proxy-buffer-size: "16k"
     nginx.ingress.kubernetes.io/server-snippet: |