Revert "add tool tip support for annotations"

* this (partially) reverts commit 39b6141
* except for the changes in OxyPlot.Maui.Skia/Manipulators/TouchTrackerManipulator.cs,
  which are kept

Author: janusw

Source/Examples/ExampleLibrary/Annotations/EllipseAnnotationExamples.cs

@@ -19,53 +19,11 @@ public static PlotModel EllipseAnnotation()
             var model = new PlotModel { Title = "EllipseAnnotation" };
             model.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom });
             model.Axes.Add(new LinearAxis { Position = AxisPosition.Left });
-            model.Annotations.Add(new EllipseAnnotation
-            {
-                X = 20,
-                Y = 60,
-                Width = 20,
-                Height = 15,
-                Text = "EllipseAnnotation",
-                ToolTip = "EllipseAnnotation",
-                TextRotation = 10,
-                Fill = OxyColor.FromAColor(99, OxyColors.Green),
-                Stroke = OxyColors.Black,
-                StrokeThickness = 2
-            });
+            model.Annotations.Add(new EllipseAnnotation { X = 20, Y = 60, Width = 20, Height = 15, Text = "EllipseAnnotation", TextRotation = 10, Fill = OxyColor.FromAColor(99, OxyColors.Green), Stroke = OxyColors.Black, StrokeThickness = 2 });
 
-            model.Annotations.Add(new EllipseAnnotation
-            {
-                X = 20,
-                Y = 20,
-                Width = 20,
-                Height = 20,
-                Fill = OxyColor.FromAColor(99, OxyColors.Green),
-                ToolTip = "Green",
-                Stroke = OxyColors.Black,
-                StrokeThickness = 2
-            });
-            model.Annotations.Add(new EllipseAnnotation
-            {
-                X = 30,
-                Y = 20,
-                Width = 20,
-                Height = 20,
-                Fill = OxyColor.FromAColor(99, OxyColors.Red),
-                ToolTip = "Red",
-                Stroke = OxyColors.Black,
-                StrokeThickness = 2
-            });
-            model.Annotations.Add(new EllipseAnnotation
-            {
-                X = 25,
-                Y = 30,
-                Width = 20,
-                Height = 20,
-                Fill = OxyColor.FromAColor(99, OxyColors.Blue),
-                ToolTip = "Blue",
-                Stroke = OxyColors.Black,
-                StrokeThickness = 2
-            });
+            model.Annotations.Add(new EllipseAnnotation { X = 20, Y = 20, Width = 20, Height = 20, Fill = OxyColor.FromAColor(99, OxyColors.Green), Stroke = OxyColors.Black, StrokeThickness = 2 });
+            model.Annotations.Add(new EllipseAnnotation { X = 30, Y = 20, Width = 20, Height = 20, Fill = OxyColor.FromAColor(99, OxyColors.Red), Stroke = OxyColors.Black, StrokeThickness = 2 });
+            model.Annotations.Add(new EllipseAnnotation { X = 25, Y = 30, Width = 20, Height = 20, Fill = OxyColor.FromAColor(99, OxyColors.Blue), Stroke = OxyColors.Black, StrokeThickness = 2 });
             return model;
         }
     }

Source/Examples/ExampleLibrary/Example.cs

@@ -30,7 +30,7 @@ public Example(PlotModel model, IPlotController controller = null)
         /// <value>
         /// The controller.
         /// </value>
-        public IPlotController Controller { get; set; }
+        public IPlotController Controller { get; private set; }
 
         /// <summary>
         /// Gets the model.

Source/Examples/ExampleLibrary/ExampleInfo.cs

@@ -32,7 +32,7 @@ public class ExampleInfo
         /// <summary>
         /// The un-modified example.
         /// </summary>
-        public Example Example { get; private set; }
+        private Example Example;
 
         /// <summary>
         /// The examples for this example info.

Source/OxyplotMauiSample/Pages/ExampleBrowser.xaml.cs

@@ -1,9 +1,6 @@
 using ExampleLibrary;
 using System.Collections.ObjectModel;
 using System.Windows.Input;
-using OxyPlot;
-using OxyPlot.Maui.Skia;
-using OxyPlot.Maui.Skia.Core;
 
 namespace OxyplotMauiSample
 {
@@ -32,46 +29,14 @@ private async void ListView_OnItemSelected(object sender, SelectedItemChangedEve
                 return;
 
             var exampleInfo = e.SelectedItem as ExampleInfo;
-            if (exampleInfo == null)
-                return;
-
             var page = new PlotViewPage
             {
                 ExampleInfo = exampleInfo
             };
-
-            // try add tracker support for annotations
-            if (exampleInfo.Tags.Contains("Annotations") && exampleInfo.PlotController == null)
-            {
-                exampleInfo.Example.Controller = CreateAnnotationTrackController();
-            }
             await Navigation.PushAsync(page);
 
             LvExamples.SelectedItem = null;
         }
-
-        private IPlotController CreateAnnotationTrackController()
-        {
-            var controller = new OxyPlot.Maui.Skia.PlotController();
-            controller.UnbindTouchDown();
-
-            var snapTrackTouch = new DelegatePlotCommand<OxyTouchEventArgs>((view, c, args) =>
-                c.AddTouchManipulator(view, new OxyPlot.Maui.Skia.Manipulators.TouchTrackerManipulator(view)
-                {
-                    Snap = true,
-                    PointsOnly = true,
-                    LockToInitialSeries = false,
-                    IsTrackAnnotations = true
-                }, args));
-
-            var cmd = new CompositeDelegateViewCommand<OxyTouchEventArgs>(
-                snapTrackTouch,
-                OxyPlot.Maui.Skia.PlotCommands.PanZoomByTouch
-            );
-            controller.BindTouchDown(cmd);
-
-            return controller;
-        }
     }
 
     public class ExampleBrowserViewModel : ViewModelBase