Make IccLut a readonly struct

src/ImageSharp/MetaData/Profiles/ICC/Various/IccLut.cs

@@ -9,10 +9,10 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
     /// <summary>
     /// Lookup Table
     /// </summary>
-    internal sealed class IccLut : IEquatable<IccLut>
+    internal readonly struct IccLut : IEquatable<IccLut>
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="IccLut"/> class.
+        /// Initializes a new instance of the <see cref="IccLut"/> struct.
         /// </summary>
         /// <param name="values">The LUT values</param>
         public IccLut(float[] values)
@@ -22,7 +22,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="IccLut"/> class.
+        /// Initializes a new instance of the <see cref="IccLut"/> struct.
         /// </summary>
         /// <param name="values">The LUT values</param>
         public IccLut(ushort[] values)
@@ -39,7 +39,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="IccLut"/> class.
+        /// Initializes a new instance of the <see cref="IccLut"/> struct.
         /// </summary>
         /// <param name="values">The LUT values</param>
         public IccLut(byte[] values)
@@ -63,12 +63,7 @@ namespace SixLabors.ImageSharp.MetaData.Profiles.Icc
         /// <inheritdoc/>
         public bool Equals(IccLut other)
         {
-            if (other == null)
-            {
-                return false;
-            }
-
-            if (ReferenceEquals(this, other))
+            if (ReferenceEquals(this.Values, other.Values))
             {
                 return true;
             }