output: drop wlr_output_cursor.events.destroy

Compositors can just listen to wlr_output.events.destroy instead.

include/wlr/types/wlr_output.h

@@ -40,10 +40,6 @@ struct wlr_output_cursor {
 	struct wlr_surface *surface;
 	struct wl_listener surface_commit;
 	struct wl_listener surface_destroy;
-
-	struct {
-		struct wl_signal destroy;
-	} events;
 };
 
 enum wlr_output_adaptive_sync_status {

types/output/cursor.c

@@ -566,7 +566,6 @@ struct wlr_output_cursor *wlr_output_cursor_create(struct wlr_output *output) {
 		return NULL;
 	}
 	cursor->output = output;
-	wl_signal_init(&cursor->events.destroy);
 	wl_list_init(&cursor->surface_commit.link);
 	cursor->surface_commit.notify = output_cursor_handle_commit;
 	wl_list_init(&cursor->surface_destroy.link);
@@ -581,7 +580,6 @@ void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor) {
 		return;
 	}
 	output_cursor_reset(cursor);
-	wlr_signal_emit_safe(&cursor->events.destroy, cursor);
 	if (cursor->output->hardware_cursor == cursor) {
 		// If this cursor was the hardware cursor, disable it
 		output_set_hardware_cursor(cursor->output, NULL, 0, 0);