refactor(ninja): use slices.Equal in mutateTags

cmd/ninja/cmd/plugin_tags.go

@@ -3,6 +3,7 @@ package cmd
 import (
 	"fmt"
 	"os"
+	"slices"
 	"sort"
 	"strings"
 
@@ -133,7 +134,7 @@ func mutateTags(op string, args []string) error {
 	sort.Strings(sortedBefore)
 	sort.Strings(sortedAfter)
 	fmt.Printf("Tags: [%s] → [%s]\n", strings.Join(sortedBefore, ", "), strings.Join(sortedAfter, ", "))
-	if !equalStringSlices(sortedBefore, sortedAfter) {
+	if !slices.Equal(sortedBefore, sortedAfter) {
 		fmt.Println("Run 'ninja plugin publish' to push to the registry.")
 	}
 	return nil
@@ -166,14 +167,3 @@ func writeLocalModTags(mod *core.ModFile, tags []string) error {
 	)
 }
 
-func equalStringSlices(a, b []string) bool {
-	if len(a) != len(b) {
-		return false
-	}
-	for i := range a {
-		if a[i] != b[i] {
-			return false
-		}
-	}
-	return true
-}