Starting metal backend

src/Engine/Math/Math.h

@@ -7,18 +7,6 @@ namespace Seele
 {
 struct Rect
 {
-	Rect()
-		: size(0, 0), offset(0, 0)
-	{
-	}
-	Rect(float sizeX, float sizeY, float offsetX, float offsetY)
-		: size(sizeX, sizeY), offset(offsetX, offsetY)
-	{
-	}
-	Rect(Vector2 size, Vector2 offset)
-		: size(size), offset(offset)
-	{
-	}
 	bool isEmpty() const
 	{
 		return size.x == 0 || size.y == 0;