Remove kubectl from dockerfile prereqs since it pulls it (#13256)
Remove kubectl from dockerfile prereqs since it pulls it (#13256)


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