Demos: Stop using Widget::foreground_color()

Demos/Cube/Cube.cpp

@@ -203,7 +203,6 @@ int main(int argc, char** argv)
     auto& time = cube.add<GUI::Label>();
     time.set_relative_rect({ 0, 4, 40, 10 });
     time.move_by({ window->width() - time.width(), 0 });
-    time.set_foreground_color(Color::from_rgb(0x222222));
     cube.set_stat_label(time);
 
     window->show();

Demos/Fire/Fire.cpp

@@ -226,7 +226,6 @@ int main(int argc, char** argv)
     auto& time = fire.add<GUI::Label>();
     time.set_relative_rect({ 0, 4, 40, 10 });
     time.move_by({ window->width() - time.width(), 0 });
-    time.set_foreground_color(Color::from_rgb(0x444444));
     fire.set_stat_label(time);
 
     window->show();