Remove note

The explict cast doesn't work as expected

src/ImageSharp/Image.LoadPixelData.cs

@@ -98,8 +98,6 @@ namespace SixLabors.ImageSharp
         public static Image<TPixel> LoadPixelData<TPixel>(Configuration config, TPixel[] data, int width, int height)
             where TPixel : struct, IPixel<TPixel>
         {
-            // There's an implict cast to Span from Array
-            // Should we remove this overload and expose Span<TPixel> ?
             return LoadPixelData(config, new Span<TPixel>(data), width, height);
         }