Removed TabControl.SelectedContent.

Not currently needed, as Deck is responsible for displaying the selected
content.

Perspex.Controls/TabControl.cs

@@ -15,12 +15,6 @@ namespace Perspex.Controls
     /// </summary>
     public class TabControl : SelectingItemsControl, IReparentingHost
     {
-        /// <summary>
-        /// Defines the <see cref="SelectedContent"/> property.
-        /// </summary>
-        public static readonly PerspexProperty<object> SelectedContentProperty =
-            PerspexProperty.Register<TabControl, object>("SelectedContent");
-
         /// <summary>
         /// Defines the <see cref="SelectedTab"/> property.
         /// </summary>
@@ -43,15 +37,6 @@ namespace Perspex.Controls
             SelectedIndexProperty.Changed.AddClassHandler<TabControl>(x => x.SelectedIndexChanged);
         }
 
-        /// <summary>
-        /// Gets the content of the selected tab.
-        /// </summary>
-        public object SelectedContent
-        {
-            get { return this.GetValue(SelectedContentProperty); }
-            private set { this.SetValue(SelectedContentProperty, value); }
-        }
-
         /// <summary>
         /// Gets the <see cref="SelectedItem"/> as a <see cref="TabItem"/>.
         /// </summary>
@@ -94,7 +79,6 @@ namespace Perspex.Controls
                 var item = this.SelectedItem as IContentControl;
                 var content = item?.Content ?? item;
                 this.SelectedTab = item as TabItem;
-                this.SelectedContent = content;
             }
         }
     }

Tests/Perspex.Controls.UnitTests/TabControlTests.cs

@@ -131,7 +131,6 @@ namespace Perspex.Controls.UnitTests
             // compare with former [2] now [1] == "3rd"
             Assert.Same(collection[1], target.SelectedItem);
             Assert.Same(target.SelectedTab, target.SelectedItem);
-            Assert.Equal("barf", target.SelectedContent);
         }
 
         private Control CreateTabControlTemplate(TabControl parent)