remove unused imports

src/Avalonia.Diagnostics/Diagnostics/DevToolsOptions.cs

@@ -1,5 +1,4 @@
-using System;
-using Avalonia.Input;
+using Avalonia.Input;
 
 namespace Avalonia.Diagnostics
 {

src/Avalonia.Diagnostics/Diagnostics/Screenshots/FilePickerHandler.cs

@@ -1,5 +1,4 @@
-using System;
-using System.IO;
+using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
 using Avalonia.Controls;

src/Avalonia.Diagnostics/Diagnostics/ViewModels/AvaloniaPropertyViewModel.cs

@@ -1,6 +1,5 @@
 using System;
 using Avalonia.Data;
-using Avalonia.Media;
 
 namespace Avalonia.Diagnostics.ViewModels
 {

src/Avalonia.Diagnostics/Diagnostics/ViewModels/ClrPropertyViewModel.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Reflection;
-using Avalonia.Media;
 
 namespace Avalonia.Diagnostics.ViewModels
 {

src/Avalonia.Diagnostics/Diagnostics/ViewModels/MainViewModel.cs

@@ -1,13 +1,11 @@
 using System;
 using System.ComponentModel;
 using System.Reactive.Linq;
-using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Diagnostics.Models;
 using Avalonia.Input;
 using Avalonia.Metadata;
 using Avalonia.Threading;
-using System.Linq;
 
 namespace Avalonia.Diagnostics.ViewModels
 {

src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreeNode.cs

@@ -6,7 +6,6 @@ using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
 using Avalonia.LogicalTree;
 using Avalonia.Media;
-using Avalonia.VisualTree;
 
 namespace Avalonia.Diagnostics.ViewModels
 {