fix(helm): remove empty volumes list from flower defaults

Empty list `[]` is truthy in Helm templates, preventing `| default`
fallback from triggering. Remove to match the pattern used by the
API section.

Author: lewisjared

helm/values.yaml

@@ -130,8 +130,6 @@ flower:
     targetCPUUtilizationPercentage: 80
     # targetMemoryUtilizationPercentage: 80
 
-  volumes: []
-  volumeMounts: []
   nodeSelector: {}
   tolerations: []
   affinity: {}