Removed known issue of black billboards now that its fixed

glow-extras @ 7fa47817

-Subproject commit 16af2f4380da22e1c2310fd3f1d9f9afd78cd223
+Subproject commit 7fa47817e36911673ca71c3d7d500b76a0a30d2c

samples/basic/viewer/main.cc

@@ -744,12 +744,6 @@ void known_issues(pm::vertex_attribute<tg::pos3> const& pos)
         // Screen space camera facing lines seem fine
         // gv::view(gv::lines(line).line_width_px(250.0f).camera_facing(), lineColors, tg::translation(0.0f, 0.0f, -25.f));
     }
-
-    // Camera facing points are always black
-    {
-        gv::view(gv::points(pos).square(), tg::color3::cyan, "camera facing points are black even though color configured");
-        // gv::no_shading makes no difference
-    }
 }
 
 int main()