Remove unnecessary dependencies

Author: ivynya

Trackr/Main.cs

@@ -1,14 +1,11 @@
 using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
-using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.IO;
 using System.Linq;
-using System.Text;
 using System.Threading;
-using System.Threading.Tasks;
 using System.Windows.Forms;
 
 namespace Trackr