Clean up unused var (istio#45078)

pilot/pkg/networking/util/util.go

@@ -73,9 +73,6 @@ const (
  InboundPassthroughClusterIpv4 = "InboundPassthroughClusterIpv4"
  InboundPassthroughClusterIpv6 = "InboundPassthroughClusterIpv6"
 
- // SniClusterFilter is the name of the sni_cluster envoy filter
- SniClusterFilter = "envoy.filters.network.sni_cluster"
-
  // IstioMetadataKey is the key under which metadata is added to a route or cluster
  // regarding the virtual service or destination rule used for each
  IstioMetadataKey = "istio"
@@ -212,11 +209,6 @@ func BuildAdditionalAddresses(extrAddresses []string, listenPort uint32, node *m
  return additionalAddresses
 }
 
-// BuildAddress returns a SocketAddress with the given ip and port or uds.
-func BuildInternalAddress(name string) *core.Address {
- return BuildInternalAddressWithIdentifier(name, "")
-}
-
 func BuildNetworkAddress(bind string, port uint32, transport istionetworking.TransportProtocol) *core.Address {
  if port == 0 {
  return nil
@@ -259,12 +251,6 @@ func IsIstioVersionGE117(version *model.IstioVersion) bool {
  version.Compare(&model.IstioVersion{Major: 1, Minor: 17, Patch: -1}) >= 0
 }
 
-// IsIstioVersionGE118 checks whether the given Istio version is greater than or equals 1.18.
-func IsIstioVersionGE118(version *model.IstioVersion) bool {
- return version == nil ||
- version.Compare(&model.IstioVersion{Major: 1, Minor: 18, Patch: -1}) >= 0
-}
-
 func IsProtocolSniffingEnabledForPort(port *model.Port) bool {
  return features.EnableProtocolSniffingForOutbound && port.Protocol.IsUnsupported()
 }