remove unused code and fix flaky test (#10204)
remove unused code and fix flaky test (#10204)

* remove unused code and fix flaky test

* remove unused code and fix flaky test

smawson/istio,geeknoid/istio,istio/istio,smawson/istio,geeknoid/istio,istio/istio,geeknoid/istio,smawson/istio,smawson/istio,geeknoid/istio,istio/istio,smawson/istio,smawson/istio,istio/istio,geeknoid/istio,geeknoid/istio,istio/istio