Removed obsolete IImageFrame<TColor>.

src/ImageSharp/Image/IImageFrame{TColor}.cs

@@ -1,18 +0,0 @@
-// <copyright file="IImageFrame{TColor}.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
-// Licensed under the Apache License, Version 2.0.
-// </copyright>
-
-namespace ImageSharp
-{
-    using System;
-
-    /// <summary>
-    /// Represents a single frame in a animation.
-    /// </summary>
-    /// <typeparam name="TColor">The pixel format.</typeparam>
-    public interface IImageFrame<TColor> : IImageBase<TColor>
-        where TColor : struct, IPackedPixel, IEquatable<TColor>
-    {
-    }
-}