Updated for RGB.NET's changes regarding rotation

src/Artemis.UI/Extensions/RgbRectangleExtensions.cs

@@ -1,12 +0,0 @@
-using System.Drawing;
-
-namespace Artemis.UI.Extensions
-{
-    public static class RgbRectangleExtensions
-    {
-        public static Rectangle ToDrawingRectangle(this RGB.NET.Core.Rectangle rectangle)
-        {
-            return new Rectangle((int) rectangle.X, (int) rectangle.Y, (int) rectangle.Width, (int) rectangle.Height);
-        }
-    }
-}