Remove blazar filter configuration from nova helm overrides (#1381) (#1395)

Blazar filters have been removed from the base nova configuration.
Users who need blazar filters can add them via override files at
/etc/genestack/helm-configs/nova/nova-helm-overrides.yaml

(cherry picked from commit ed1bb57)

Co-authored-by: Joe <109156995+joew7456@users.noreply.github.com>

Author: bjoernt

base-helm-configs/nova/nova-helm-overrides.yaml

@@ -134,9 +134,6 @@ conf:
       use_db_reconnect: true
       pool_timeout: 60
       max_retries: -1
-    filter_scheduler:
-      available_filters: blazarnova.scheduler.filters.blazar_filter.BlazarFilter
-      enabled_filters: BlazarFilter
     glance:
       num_retries: 8
     key_manager: