Continue cleaning.

src/graphics/RasterPainter.h

@@ -1,11 +1,10 @@
 #pragma once
 
 #include "AbstractPainter.h"
+
 #include <memory>
 
 class DrawingContext;
-
-template<class T>
 class Grid;
 
 class RasterPainter : public AbstractPainter
@@ -16,5 +15,5 @@ public:
     void paint() override;
 
 private:
-    std::unique_ptr<Grid<unsigned char> > mGrid;
+    std::unique_ptr<Grid> mGrid;
 };