Remove unused using directives in EntryPoint.cs

    Unused using directives for System, System.IO, and System.Reflection were removed to clean up the code. This improves readability and ensures adherence to good coding practices. No functional changes were made.

Author: ivandrofly

source/HI2UC/EntryPoint.cs

@@ -1,8 +1,5 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Diagnostics;
-using System.IO;
-using System.Reflection;
 using System.Windows.Forms;
 using Nikse.SubtitleEdit.PluginLogic.Services;