revert changes back

Author: paulyufan2

cns/middlewares/k8sSwiftV2.go

@@ -3,7 +3,6 @@ package middlewares
 import (
 	"context"
 	"fmt"
-	"net/netip"
 
 	"github.com/Azure/azure-container-networking/cns"
 	"github.com/Azure/azure-container-networking/cns/configuration"
@@ -248,65 +247,3 @@ func (k *K8sSWIFTv2Middleware) getIPConfig(ctx context.Context, podInfo cns.PodI
 func (k *K8sSWIFTv2Middleware) Type() cns.SWIFTV2Mode {
 	return cns.K8sSWIFTV2
 }
-
-func (k *K8sSWIFTv2Middleware) addRoutes(cidrs []string, gatewayIP string) []cns.Route {
-	routes := make([]cns.Route, len(cidrs))
-	for i, cidr := range cidrs {
-		routes[i] = cns.Route{
-			IPAddress:        cidr,
-			GatewayIPAddress: gatewayIP,
-		}
-	}
-	return routes
-}
-
-func (k *K8sSWIFTv2Middleware) SetInfraRoutes(podIPInfo *cns.PodIpInfo) ([]cns.Route, error) {
-	var routes []cns.Route
-
-	// Get and parse infraVNETCIDRs from env
-	infraVNETCIDRs, err := configuration.InfraVNETCIDRs()
-	if err != nil {
-		return nil, errors.Wrapf(err, "failed to get infraVNETCIDRs from env")
-	}
-	infraVNETCIDRsv4, infraVNETCIDRsv6, err := utils.ParseCIDRs(infraVNETCIDRs)
-	if err != nil {
-		return nil, errors.Wrapf(err, "failed to parse infraVNETCIDRs")
-	}
-
-	// Get and parse podCIDRs from env
-	podCIDRs, err := configuration.PodCIDRs()
-	if err != nil {
-		return nil, errors.Wrapf(err, "failed to get podCIDRs from env")
-	}
-	podCIDRsV4, podCIDRv6, err := utils.ParseCIDRs(podCIDRs)
-	if err != nil {
-		return nil, errors.Wrapf(err, "failed to parse podCIDRs")
-	}
-
-	// Get and parse serviceCIDRs from env
-	serviceCIDRs, err := configuration.ServiceCIDRs()
-	if err != nil {
-		return nil, errors.Wrapf(err, "failed to get serviceCIDRs from env")
-	}
-	serviceCIDRsV4, serviceCIDRsV6, err := utils.ParseCIDRs(serviceCIDRs)
-	if err != nil {
-		return nil, errors.Wrapf(err, "failed to parse serviceCIDRs")
-	}
-
-	ip, err := netip.ParseAddr(podIPInfo.PodIPConfig.IPAddress)
-	if err != nil {
-		return nil, errors.Wrapf(err, "failed to parse podIPConfig IP address %s", podIPInfo.PodIPConfig.IPAddress)
-	}
-
-	if ip.Is4() {
-		routes = append(routes, k.addRoutes(podCIDRsV4, overlayGatewayv4)...)
-		routes = append(routes, k.addRoutes(serviceCIDRsV4, overlayGatewayv4)...)
-		routes = append(routes, k.addRoutes(infraVNETCIDRsv4, overlayGatewayv4)...)
-	} else {
-		routes = append(routes, k.addRoutes(podCIDRv6, overlayGatewayV6)...)
-		routes = append(routes, k.addRoutes(serviceCIDRsV6, overlayGatewayV6)...)
-		routes = append(routes, k.addRoutes(infraVNETCIDRsv6, overlayGatewayV6)...)
-	}
-
-	return routes, nil
-}