Remove unused ValueConverterGroup

src/Avalonia.Controls.ColorPicker/Converters/ValueConverterGroup.cs

@@ -1,50 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Globalization;
-using Avalonia.Data.Converters;
-
-namespace Avalonia.Controls.Primitives.Converters
-{
-    /// <summary>
-    /// Converter to chain together multiple converters.
-    /// </summary>
-    public class ValueConverterGroup : List<IValueConverter>, IValueConverter
-    {
-        /// <inheritdoc/>
-        /// <inheritdoc/>
-        public object? Convert(
-            object? value,
-            Type targetType,
-            object? parameter,
-            CultureInfo culture)
-        {
-            object? curValue;
-
-            curValue = value;
-            for (int i = 0; i < Count; i++)
-            {
-                curValue = this[i].Convert(curValue, targetType, parameter, culture);
-            }
-
-            return curValue;
-        }
-
-        /// <inheritdoc/>
-        public object? ConvertBack(
-            object? value,
-            Type targetType,
-            object? parameter,
-            CultureInfo culture)
-        {
-            object? curValue;
-
-            curValue = value;
-            for (int i = (Count - 1); i >= 0; i--)
-            {
-                curValue = this[i].ConvertBack(curValue, targetType, parameter, culture);
-            }
-
-            return curValue;
-        }
-    }
-}