xdg-shell: drop wlr_xdg_toplevel_set_fullscreen_event

Instead, compositors can read relevant values from
wlr_xdg_toplevel.requested.

include/wlr/types/wlr_xdg_shell.h

@@ -243,12 +243,6 @@ struct wlr_xdg_toplevel_resize_event {
 	uint32_t edges;
 };
 
-struct wlr_xdg_toplevel_set_fullscreen_event {
-	struct wlr_xdg_toplevel *toplevel;
-	bool fullscreen;
-	struct wlr_output *output;
-};
-
 struct wlr_xdg_toplevel_show_window_menu_event {
 	struct wlr_xdg_toplevel *toplevel;
 	struct wlr_seat_client *seat;

types/xdg_shell/wlr_xdg_toplevel.c

@@ -366,13 +366,7 @@ static void xdg_toplevel_handle_set_fullscreen(struct wl_client *client,
 
 	store_fullscreen_requested(toplevel, true, output);
 
-	struct wlr_xdg_toplevel_set_fullscreen_event event = {
-		.toplevel = toplevel,
-		.fullscreen = true,
-		.output = output,
-	};
-
-	wlr_signal_emit_safe(&toplevel->events.request_fullscreen, &event);
+	wlr_signal_emit_safe(&toplevel->events.request_fullscreen, NULL);
 	wlr_xdg_surface_schedule_configure(toplevel->base);
 }
 
@@ -383,13 +377,7 @@ static void xdg_toplevel_handle_unset_fullscreen(struct wl_client *client,
 
 	store_fullscreen_requested(toplevel, false, NULL);
 
-	struct wlr_xdg_toplevel_set_fullscreen_event event = {
-		.toplevel = toplevel,
-		.fullscreen = false,
-		.output = NULL,
-	};
-
-	wlr_signal_emit_safe(&toplevel->events.request_fullscreen, &event);
+	wlr_signal_emit_safe(&toplevel->events.request_fullscreen, NULL);
 	wlr_xdg_surface_schedule_configure(toplevel->base);
 }