Fix crash when quitting a QT app on the wayland backend using menu

QT unmaps the view before destroying the popup. We destroyed the popup
in response to the view unmapping, but then we'd attempt to destroy it a
second time which caused a crash.

The patch removes the listener.

I tested it with GTK as well, and can confirm the popup is still being
destroyed.

1 files changed, 0 insertions, 1 deletions

diff --git a/include/sway/tree/view.h b/include/sway/tree/view.h
index dc1f0b02..a0b4dd46 100644
--- a/include/sway/tree/view.h
+++ b/include/sway/tree/view.h
@@ -226,7 +226,6 @@ struct sway_view_child {
         struct wl_listener surface_map;
         struct wl_listener surface_unmap;
         struct wl_listener surface_destroy;
-        struct wl_listener view_unmap;
 };
 
 struct sway_xdg_popup_v6 {