lint: apply x/tools/modernize fixes

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

store/nodegroup.go

@@ -2,6 +2,7 @@ package store
 
 import (
 	"fmt"
+	"slices"
 	"time"
 
 	"github.com/containerd/platforms"
@@ -44,7 +45,7 @@ func (ng *NodeGroup) Leave(name string) error {
 	if len(ng.Nodes) == 1 {
 		return errors.Errorf("can not leave last node, do you want to rm instance instead?")
 	}
-	ng.Nodes = append(ng.Nodes[:i], ng.Nodes[i+1:]...)
+	ng.Nodes = slices.Delete(ng.Nodes, i, i+1)
 	return nil
 }
 

store/util.go

@@ -39,7 +39,7 @@ func ValidateName(s string) (string, error) {
 
 func GenerateName(txn *Txn) (string, error) {
 	var name string
-	for i := 0; i < 6; i++ {
+	for i := range 6 {
 		name = namesgenerator.GetRandomName(i)
 		if _, err := txn.NodeGroupByName(name); err != nil {
 			if !os.IsNotExist(errors.Cause(err)) {