清理命名空间

Author: JiuLing-zhang

src/ComputerLock/WindowBlankScreen.xaml.cs

@@ -1,7 +1,5 @@
 using System.Windows;
-using System.Windows.Controls;
 using System.Windows.Input;
-using System.Windows.Media.Animation;
 
 namespace ComputerLock
 {

src/ComputerLock/WindowLockScreen.xaml.cs

@@ -1,7 +1,5 @@
 using System.Windows;
-using System.Windows.Controls;
 using System.Windows.Input;
-using System.Windows.Media.Animation;
 using System.Windows.Threading;
 
 namespace ComputerLock;