[botanist] Remove IPv6 getter

Not necesary and not specific to a device target

Change-Id: I48f6b35ecb3f3b8f279311c49b9be58672631e48
diff --git a/botanist/target/device.go b/botanist/target/device.go
index a299a21..dadafdb 100644
--- a/botanist/target/device.go
+++ b/botanist/target/device.go
@@ -93,11 +93,6 @@
 	return t.config.Network.Nodename
 }
 
-// IPv6 returns the link-local IPv6 address of the node.
-func (t *DeviceTarget) IPv6Addr() (*net.UDPAddr, error) {
-	return netutil.GetNodeAddress(context.Background(), t.Nodename(), false)
-}
-
 // IPv4Addr returns the IPv4 address of the node. If not provided in the config, then it
 // will be resolved against the target-side MDNS server.
 func (t *DeviceTarget) IPv4Addr() (net.IP, error) {
@@ -151,7 +146,7 @@
 		}
 	}()
 
-	addr, err := t.IPv6Addr()
+	addr, err := netutil.GetNodeAddress(ctx, t.Nodename(), false)
 	if err != nil {
 		return err
 	}
diff --git a/cmd/botanist/zedboot.go b/cmd/botanist/zedboot.go
index 7999d9d..bf98c83 100644
--- a/cmd/botanist/zedboot.go
+++ b/cmd/botanist/zedboot.go
@@ -22,6 +22,7 @@
 	"fuchsia.googlesource.com/tools/build"
 	"fuchsia.googlesource.com/tools/command"
 	"fuchsia.googlesource.com/tools/logger"
+	"fuchsia.googlesource.com/tools/netutil"
 	"fuchsia.googlesource.com/tools/runner"
 	"fuchsia.googlesource.com/tools/runtests"
 
@@ -233,7 +234,7 @@
 		}(device)
 	}
 	go func() {
-		addr, err := devices[0].IPv6Addr()
+		addr, err := netutil.GetNodeAddress(ctx, devices[0].Nodename(), false)
 		if err != nil {
 			errs <- err
 			return