Deleted CustomCanvas

Deleted CustomCanvas as it no longer serves a purpose

SketchAssistant/SketchAssistantWPF/CustomCanvas.cs

@@ -1,18 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Automation.Peers;
-using System.Windows.Controls;
-
-namespace SketchAssistantWPF
-{
-    public class CustomCanvas : Canvas
-    {
-        protected override AutomationPeer OnCreateAutomationPeer()
-        {
-            return new FrameworkElementAutomationPeer(this);
-        }
-    }
-}