Remove ICustomDrawOperation from the IDrawingContextImpl as it seems useless there now

src/Avalonia.Base/Media/ImmediateDrawingContext.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using Avalonia.Platform;
-using Avalonia.Rendering.SceneGraph;
 using Avalonia.Threading;
 using Avalonia.Utilities;
 using Avalonia.Media.Imaging;

src/Avalonia.Base/Platform/IDrawingContextImpl.cs

@@ -1,6 +1,5 @@
 using System;
 using Avalonia.Media;
-using Avalonia.Rendering.SceneGraph;
 using Avalonia.Utilities;
 using Avalonia.Media.Imaging;
 using Avalonia.Metadata;
@@ -168,12 +167,6 @@ namespace Avalonia.Platform
         /// </summary>
         void PopBitmapBlendMode();
 
-        /// <summary>
-        /// Adds a custom draw operation
-        /// </summary>
-        /// <param name="custom">Custom draw operation</param>
-        void Custom(ICustomDrawOperation custom);
-
         /// <summary>
         /// Attempts to get an optional feature from the drawing context implementation
         /// </summary>

src/Avalonia.Base/Rendering/Composition/Server/DrawingContextProxy.cs

@@ -143,11 +143,6 @@ internal class CompositorDrawingContextProxy : IDrawingContextImpl,
         _impl.PopBitmapBlendMode();
     }
 
-    public void Custom(ICustomDrawOperation custom)
-    {
-        _impl.Custom(custom);
-    }
-
     public object? GetFeature(Type t) => _impl.GetFeature(t);
     
 

src/Headless/Avalonia.Headless/HeadlessPlatformRenderInterface.cs

@@ -433,12 +433,7 @@ namespace Avalonia.Headless
             {
                 
             }
-
-            public void Custom(ICustomDrawOperation custom)
-            {
-
-            }
-
+            
             public object? GetFeature(Type t)
             {
                 return null;

src/Skia/Avalonia.Skia/DrawingContextImpl.cs

@@ -5,12 +5,9 @@ using System.Linq;
 using System.Threading;
 using Avalonia.Media;
 using Avalonia.Platform;
-using Avalonia.Rendering;
-using Avalonia.Rendering.SceneGraph;
 using Avalonia.Rendering.Utilities;
 using Avalonia.Utilities;
 using Avalonia.Media.Imaging;
-using Avalonia.Skia.Helpers;
 using SkiaSharp;
 using ISceneBrush = Avalonia.Media.ISceneBrush;
 
@@ -667,12 +664,6 @@ namespace Avalonia.Skia
             _currentBlendingMode = _blendingModeStack.Pop();
         }
 
-        public void Custom(ICustomDrawOperation custom)
-        {
-            CheckLease();
-            custom.Render(this);
-        }
-
         /// <inheritdoc />
         public void PushOpacityMask(IBrush mask, Rect bounds)
         {

src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs

@@ -3,8 +3,6 @@ using System.Collections.Generic;
 using System.Numerics;
 using Avalonia.Media;
 using Avalonia.Platform;
-using Avalonia.Rendering;
-using Avalonia.Rendering.SceneGraph;
 using Avalonia.Utilities;
 using Avalonia.Media.Imaging;
 using SharpDX;
@@ -608,8 +606,7 @@ namespace Avalonia.Direct2D1.Media
         {
             PopLayer();
         }
-        
-        public void Custom(ICustomDrawOperation custom) => custom.Render(this);
+
         public object GetFeature(Type t) => null;
     }
 }