Remove unneeded classes/methods.

src/Avalonia.Base/PropertyStore/UntypedBindingEntry.cs

@@ -1,39 +0,0 @@
-using System;
-using Avalonia.Data;
-
-namespace Avalonia.PropertyStore
-{
-    /// <summary>
-    /// An <see cref="IValueEntry"/> that holds a binding whose source observable and target
-    /// property are both untyped.
-    /// </summary>
-    internal class UntypedBindingEntry : BindingEntryBase<object?, object?>
-    {
-        private readonly Func<object?, bool>? _validate;
-
-        public UntypedBindingEntry(
-            AvaloniaObject target,
-            ValueFrame frame,
-            AvaloniaProperty property,
-            IObservable<object?> source)
-            : base(target, frame, property, source)
-        {
-            _validate = ((IStyledPropertyAccessor)property).ValidateValue;
-        }
-
-        protected override BindingValue<object?> ConvertAndValidate(object? value)
-        {
-            return UntypedValueUtils.ConvertAndValidate(value, Property.PropertyType, _validate);
-        }
-
-        protected override BindingValue<object?> ConvertAndValidate(BindingValue<object?> value)
-        {
-            throw new NotSupportedException();
-        }
-
-        protected override object? GetDefaultValue(Type ownerType)
-        {
-            return ((IStyledPropertyMetadata)Property.GetMetadata(ownerType)).DefaultValue;
-        }
-    }
-}

src/Avalonia.Base/PropertyStore/UntypedValueUtils.cs

@@ -23,23 +23,5 @@ namespace Avalonia.PropertyStore
 
             return v;
         }
-
-        [UnconditionalSuppressMessage("Trimming", "IL2026", Justification = TrimmingMessages.ImplicitTypeConversionSupressWarningMessage)]
-        public static bool TryConvertAndValidate<T>(
-            StyledProperty<T> property,
-            object? value, 
-            [MaybeNullWhen(false)] out T result)
-        {
-            if (TypeUtilities.TryConvertImplicit(typeof(T), value, out var v))
-            {
-                result = (T)v!;
-
-                if (property.ValidateValue?.Invoke(result) != false)
-                    return true;
-            }
-
-            result = default;
-            return false;
-        }
     }
 }

src/Avalonia.Base/Styling/PropertySetterBindingInstance.cs

@@ -1,60 +0,0 @@
-using System;
-using Avalonia.Data;
-using Avalonia.PropertyStore;
-
-namespace Avalonia.Styling
-{
-    internal class PropertySetterBindingInstance : UntypedBindingEntry, ISetterInstance
-    {
-        private readonly AvaloniaObject _target;
-        private readonly BindingMode _mode;
-
-        public PropertySetterBindingInstance(
-            AvaloniaObject target,
-            StyleInstance instance,
-            AvaloniaProperty property,
-            BindingMode mode,
-            IObservable<object?> source)
-            : base(target, instance, property, source)
-        {
-            _target = target;
-            _mode = mode;
-
-            if (mode == BindingMode.TwoWay &&
-                source is not IObserver<object?>)
-            {
-                throw new NotSupportedException(
-                    "Attempting to bind two-way with a binding source which doesn't support it.");
-            }
-        }
-
-        public override void Unsubscribe()
-        {
-            _target.PropertyChanged -= PropertyChanged;
-            base.Unsubscribe();
-        }
-
-        protected override void Start(bool produceValue)
-        {
-            if (!IsSubscribed)
-            {
-                if (_mode == BindingMode.TwoWay)
-                {
-                    var observer = (IObserver<object?>)Source;
-                    _target.PropertyChanged += PropertyChanged;
-                }
-
-                base.Start(produceValue);
-            }
-        }
-
-        private void PropertyChanged(object? sender, AvaloniaPropertyChangedEventArgs e)
-        {
-            if (e.Property == Property && e.Priority >= BindingPriority.LocalValue)
-            {
-                if (Frame.Owner is not null && !Frame.Owner.IsEvaluating)
-                    ((IObserver<object?>)Source).OnNext(e.NewValue);
-            }
-        }
-    }
-}