diff --git a/th04/shared.hpp b/th04/shared.hpp
index b668993c..849717ed 100644
--- a/th04/shared.hpp
+++ b/th04/shared.hpp
@@ -10,8 +10,6 @@ private:
 	int v;
 
 public:
-	Subpixel() {}
-	Subpixel(float screen_v) { *this = screen_v; }
 
 	Subpixel& operator =(float screen_v) {
 		v = static_cast<int>(screen_v * 16.0f);