remove unused imports

ntfysh_client/NotificationDialog.cs

@@ -1,15 +1,8 @@
 using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Data;
 using System.Drawing;
-using System.Linq;
 using System.Runtime.InteropServices;
-using System.Security.Cryptography.X509Certificates;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
-using static System.Windows.Forms.VisualStyles.VisualStyleElement;
+
 
 namespace ntfysh_client
 {