Code cleanup.

src/Magnum/Magnum.h

@@ -559,7 +559,6 @@ enum class ColorType: GLenum;
 typedef ColorFormat ImageFormat;
 typedef ColorType ColorType;
 
-enum class Version: Int;
 class Context;
 class CubeMapTexture;
 
@@ -618,6 +617,8 @@ enum class TextureFormat: GLenum;
 
 class Timeline;
 
+enum class Version: Int;
+
 }
 
 #endif