优化代码

Ink Canvas/Helpers/FloatingWindowInterceptor.cs

@@ -5,7 +5,6 @@ using System.Linq;
 using System.Runtime.InteropServices;
 using System.Text;
 using System.Threading;
-using System.Threading.Tasks;
 using System.Windows.Threading;
 
 namespace Ink_Canvas.Helpers

Ink Canvas/Helpers/MultiPPTInkManager.cs

@@ -1,7 +1,6 @@
 using Microsoft.Office.Interop.PowerPoint;
 using System;
 using System.Collections.Generic;
-using System.IO;
 using System.Linq;
 using System.Runtime.InteropServices;
 using System.Security.Cryptography;

Ink Canvas/Helpers/ScreenDetectionHelper.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Drawing;
-using System.Linq;
 using System.Windows;
 using System.Windows.Forms;
 using System.Windows.Interop;