IDE-s & analyzers why are you doing this to me? It's 2018!

src/ImageSharp/Image/ImageFrame{TPixel}.cs

@@ -10,11 +10,10 @@ using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.MetaData;
 using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.Primitives;
 
 namespace SixLabors.ImageSharp
 {
-    using SixLabors.Primitives;
-
     /// <summary>
     /// Represents a single frame in a animation.
     /// </summary>