remove unused wl_listener
@@ -45,7 +45,6 @@ struct wlr_tablet_v2_tablet_tool {
struct wlr_tablet_tool_client_v2 *current_client;
struct wlr_surface *focused_surface;
struct wl_listener surface_destroy;
- struct wl_listener client_destroy;
uint32_t proximity_serial;
bool is_down;
