Fix compilazione: rimozione classe utils (non necessaria)

WebDoorCreator.API/Utils.cs

@@ -1,21 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using static System.Net.Mime.MediaTypeNames;
-
-namespace WebDoorCreator.Core
-{
-    public class Utils
-    {
-        public static byte[] ImageToByte2(Image img)
-        {
-            using (var stream = new MemoryStream())
-            {
-                img.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
-                return stream.ToArray();
-            }
-        }
-    }
-}