ingress-nginx: Remove the controller configuration.

ingress-nginx has been replaced by Traefik.  Keep the nginx IngressClass,
which Traefik's ingress-nginx compat provider selects on.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Change-Id: Ib1ecb2fb10a081823ed8db842bfce76447b06ae4
2 files changed