fix #542: Code completion window description tooltip missing

Author: siegfriedpammer

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/CodeCompletion/CompletionWindow.cs

@@ -64,8 +64,6 @@ public CompletionWindow(TextArea textArea) : base(textArea)
 		}
 
 		#region ToolTip handling
-		public bool ShowDocumentationTooltips { get; set; }
-		
 		void toolTip_Closed(object sender, RoutedEventArgs e)
 		{
 			// Clear content after tooltip is closed.
@@ -77,11 +75,6 @@ void toolTip_Closed(object sender, RoutedEventArgs e)
 
 		void completionList_SelectionChanged(object sender, SelectionChangedEventArgs e)
 		{
-			if (!ShowDocumentationTooltips) {
-				toolTip.IsOpen = false;
-				return;
-			}
-			
 			var item = completionList.SelectedItem;
 			if (item == null)
 				return;