Its last usage was removed in 31838bf17e.
31838bf17e
@ -262,7 +262,6 @@ struct drm_backend {
struct wl_list plane_list;
int sprites_are_broken;
int sprites_hidden;
void *repaint_data;
@ -2669,9 +2669,6 @@ planes_binding(struct weston_keyboard *keyboard, const struct timespec *time,
if (b->atomic_modeset)
b->sprites_are_broken ^= 1;
break;
case KEY_O:
b->sprites_hidden ^= 1;
default:
}