xwayland: Remove undeeded test

xwl_seat_maybe_lock_on_hidden_cursor() checks that the value of
cursor_confinement_window is not NULL, yet there is no code path
that could lead to this.

Remove the test for cursor_confinement_window being set, it's useless.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Carlos Garnacho <carlosg@gnome.org>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

hw/xwayland/xwayland-input.c

@@ -2823,8 +2823,7 @@ xwl_seat_maybe_lock_on_hidden_cursor(struct xwl_seat *xwl_seat)
      * to implement infinite panning (eg. 3D views), lock the
      * pointer for so the relative pointer is used.
      */
-    if (xwl_seat->x_cursor ||
-        !xwl_seat->cursor_confinement_window)
+    if (xwl_seat->x_cursor)
         return FALSE;
 
     if (!xwl_seat->focus_window)