Remove Empty field and IsEmpty property from Color/HsvColor

src/Avalonia.Visuals/Media/Color.cs

@@ -14,11 +14,6 @@ namespace Avalonia.Media
 #endif
     readonly struct Color : IEquatable<Color>
     {
-        /// <summary>
-        /// Represents a null <see cref="Color"/> with zero set for all channels.
-        /// </summary>
-        public static readonly Color Empty = new Color();
-
         static Color()
         {
 #if !BUILDTASK
@@ -46,18 +41,6 @@ namespace Avalonia.Media
         /// </summary>
         public byte B { get; }
 
-        /// <summary>
-        /// Gets a value indicating whether this <see cref="Color"/> is uninitialized and
-        /// considered null.
-        /// </summary>
-        public bool IsEmpty
-        {
-            get => A == 0 &&
-                   R == 0 &&
-                   G == 0 &&
-                   B == 0;
-        }
-
         public Color(byte a, byte r, byte g, byte b)
         {
             A = a;

src/Avalonia.Visuals/Media/HsvColor.cs

@@ -16,11 +16,6 @@ namespace Avalonia.Media
 #endif
     readonly struct HsvColor : IEquatable<HsvColor>
     {
-        /// <summary>
-        /// Represents a null <see cref="HsvColor"/> with zero set for all channels.
-        /// </summary>
-        public static readonly HsvColor Empty = new HsvColor();
-
         ////////////////////////////////////////////////////////////////////////
         // Constructors
         ////////////////////////////////////////////////////////////////////////
@@ -99,18 +94,6 @@ namespace Avalonia.Media
         /// </summary>
         public double V { get; }
 
-        /// <summary>
-        /// Gets a value indicating whether this <see cref="HsvColor"/> is uninitialized and
-        /// considered null.
-        /// </summary>
-        public bool IsEmpty
-        {
-            get => A == 0 &&
-                   H == 0 &&
-                   S == 0 &&
-                   V == 0;
-        }
-
         ////////////////////////////////////////////////////////////////////////
         // Methods
         ////////////////////////////////////////////////////////////////////////