Remove noop sections

Signed-off-by: Dimitar Dimitrov <dimitar.dimitrov@grafana.com>

Author: dimitarvdimitrov

operations/helm/charts/mimir-distributed/ci/offline/test-enterprise-federation-frontend-values.yaml

@@ -66,11 +66,3 @@ results-cache:
 # Keep using minio to allow setting up the admin bucket
 minio:
   enabled: true
-
-# Disable nginx gateway
-nginx:
-  enabled: false
-
-# Disable GEM gateway
-gateway:
-  enabled: false