Remove unused variables

GUI/coregui/Views/SampleDesigner/DesignerHelper.cpp

@@ -20,9 +20,6 @@
 #include <iostream>
 #include "StyleUtils.h"
 
-int DesignerHelper::m_default_layer_height = 30;
-int DesignerHelper::m_default_layer_width = 200;
-
 namespace
 {
 double m_current_zoom_level = 1.0;

GUI/coregui/Views/SampleDesigner/DesignerHelper.h

@@ -77,10 +77,6 @@ public:
     static int getLabelFontSize();
     static int getPortFontSize();
     static int getPythonEditorFontSize();
-
-private:
-    static int m_default_layer_height;
-    static int m_default_layer_width;
 };
 
 #endif // DESIGNERHELPER_H