remove unused code

Change-Id: If821920ec8872e326b7d85437ad8d2620807799d

pkg/cloudprovider/providers/azure/azure_standard.go

@@ -568,16 +568,6 @@ func extractResourceGroupByNicID(nicID string) (string, error) {
 	return matches[1], nil
 }
 
-// extractResourceGroupByPipID extracts the resource group name by publicIP ID.
-func extractResourceGroupByPipID(pipID string) (string, error) {
-	matches := publicIPResourceGroupRE.FindStringSubmatch(pipID)
-	if len(matches) != 2 {
-		return "", fmt.Errorf("error of extracting resourceGroup from pipID %q", pipID)
-	}
-
-	return matches[1], nil
-}
-
 // getPrimaryInterfaceWithVMSet gets machine primary network interface by node name and vmSet.
 func (as *availabilitySet) getPrimaryInterfaceWithVMSet(nodeName, vmSetName string) (network.Interface, error) {
 	var machine compute.VirtualMachine

pkg/cloudprovider/providers/gce/gce.go

@@ -81,11 +81,6 @@ const (
 	gceComputeAPIEndpointBeta = "https://www.googleapis.com/compute/beta/"
 )
 
-// gceObject is an abstraction of all GCE API object in go client
-type gceObject interface {
-	MarshalJSON() ([]byte, error)
-}
-
 var _ cloudprovider.Interface = (*Cloud)(nil)
 var _ cloudprovider.Instances = (*Cloud)(nil)
 var _ cloudprovider.LoadBalancer = (*Cloud)(nil)

pkg/cloudprovider/providers/gce/gce_util.go

@@ -244,10 +244,6 @@ func makeGoogleAPINotFoundError(message string) error {
 	return &googleapi.Error{Code: http.StatusNotFound, Message: message}
 }
 
-func makeGoogleAPIError(code int, message string) error {
-	return &googleapi.Error{Code: code, Message: message}
-}
-
 // TODO(#51665): Remove this once Network Tiers becomes Beta in GCP.
 func handleAlphaNetworkTierGetError(err error) (string, error) {
 	if isForbidden(err) {

pkg/cloudprovider/providers/openstack/openstack_loadbalancer.go

@@ -85,8 +85,6 @@ type LbaasV2 struct {
 	LoadBalancer
 }
 
-type empty struct{}
-
 func networkExtensions(client *gophercloud.ServiceClient) (map[string]bool, error) {
 	seen := make(map[string]bool)