cleanup code

SQLite.cs

@@ -1,9 +1,7 @@
 using CefSharp;
 using System.Collections.Generic;
-using System.Data;
 using System.Data.SQLite;
 using System.Threading;
-using System.Windows.Forms;
 
 namespace VRCX
 {

VRCX.cs

@@ -7,7 +7,6 @@ using CefSharp;
 using Microsoft.Win32;
 using System;
 using System.Diagnostics;
-using System.Text;
 using System.Text.RegularExpressions;
 using System.Windows.Forms;
 

VRCXVR.cs

@@ -13,7 +13,6 @@ using System.Collections.Generic;
 using System.Runtime.InteropServices;
 using System.Text;
 using System.Threading;
-using System.Windows.Forms;
 using Valve.VR;
 using Device = SharpDX.Direct3D11.Device;