fix(gallery): do not attempt to delete duplicate files (#3031)

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

pkg/utils/strings.go

@@ -18,3 +18,15 @@ func RandString(n int) string {
 	}
 	return string(b)
 }
+
+func Unique(arr []string) []string {
+	unique := make(map[string]bool)
+	var result []string
+	for _, item := range arr {
+		if _, ok := unique[item]; !ok {
+			unique[item] = true
+			result = append(result, item)
+		}
+	}
+	return result
+}