[mutter/gbsneto/graphene-frustrum: 10/13] clutter/stage: Remove outdated comment

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit eb458fcdfc82af0b38312c2fd177b7aecd2d8e32
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Oct 9 20:54:14 2020 -0300

    clutter/stage: Remove outdated comment

 clutter/clutter/clutter-stage.c | 5 -----
 1 file changed, 5 deletions(-)
---
diff --git a/clutter/clutter/clutter-stage.c b/clutter/clutter/clutter-stage.c
index 9523cb0e84..a6e0fba295 100644
--- a/clutter/clutter/clutter-stage.c
+++ b/clutter/clutter/clutter-stage.c
@@ -729,11 +729,6 @@ _cogl_util_get_eye_planes_for_screen_poly (float                   *polygon,
                                        tmp_poly,
                                        n_vertices * 2);
 
-  /* XXX: It's quite ugly that we end up with these casts between
-   * Vector4 types and CoglVector3s, it might be better if the
-   * cogl_vector APIs just took pointers to floats.
-   */
-
   for (i = 0; i < n_vertices; i++)
     {
       graphene_point3d_t p[3];