Remove dead code for OpenStack provider

Author: FengyunPan

pkg/cloudprovider/providers/openstack/openstack_loadbalancer.go

@@ -546,15 +546,6 @@ func (lbaas *LbaasV2) createLoadBalancer(service *v1.Service, name string) (*loa
 	return loadbalancer, nil
 }
 
-func stringInArray(x string, list []string) bool {
-	for _, y := range list {
-		if y == x {
-			return true
-		}
-	}
-	return false
-}
-
 func (lbaas *LbaasV2) GetLoadBalancer(clusterName string, service *v1.Service) (*v1.LoadBalancerStatus, bool, error) {
 	loadBalancerName := cloudprovider.GetLoadBalancerName(service)
 	loadbalancer, err := getLoadbalancerByName(lbaas.network, loadBalancerName)