seat: remove unused keyboard focus_change event

include/wlr/types/wlr_seat.h

@@ -148,7 +148,7 @@ struct wlr_seat_pointer_state {
 	struct wl_listener surface_destroy;
 
 	struct {
-		struct wl_signal focus_change;
+		struct wl_signal focus_change; // wlr_seat_pointer_focus_change_event
 	} events;
 };
 
@@ -168,10 +168,6 @@ struct wlr_seat_keyboard_state {
 
 	struct wlr_seat_keyboard_grab *grab;
 	struct wlr_seat_keyboard_grab *default_grab;
-
-	struct {
-		struct wl_signal focus_change;
-	} events;
 };
 
 struct wlr_seat_touch_state {
@@ -252,14 +248,6 @@ struct wlr_seat_pointer_focus_change_event {
 	double sx, sy;
 };
 
-struct wlr_seat_keyboard_focus_change_event {
-	struct wlr_seat *seat;
-	struct wlr_surface *old_surface, *new_surface;
-	size_t num_keycodes;
-	uint32_t *keycodes;
-	struct wlr_keyboard_modifiers *modifiers;
-};
-
 /**
  * Allocates a new wlr_seat and adds a wl_seat global to the display.
  */

types/seat/wlr_seat.c

@@ -243,8 +243,6 @@ struct wlr_seat *wlr_seat_create(struct wl_display *display, const char *name) {
 	seat->keyboard_state.seat = seat;
 	wl_list_init(&seat->keyboard_state.surface_destroy.link);
 
-	wl_signal_init(&seat->keyboard_state.events.focus_change);
-
 	// touch state
 	struct wlr_seat_touch_grab *touch_grab =
 		calloc(1, sizeof(struct wlr_seat_touch_grab));

types/seat/wlr_seat_keyboard.c

@@ -291,16 +291,6 @@ void wlr_seat_keyboard_enter(struct wlr_seat *seat,
 		// as it targets seat->keyboard_state.focused_client
 		wlr_seat_keyboard_send_modifiers(seat, modifiers);
 	}
-
-	struct wlr_seat_keyboard_focus_change_event event = {
-		.seat = seat,
-		.new_surface = surface,
-		.old_surface = focused_surface,
-		.num_keycodes = num_keycodes,
-		.keycodes = keycodes,
-		.modifiers = modifiers,
-	};
-	wlr_signal_emit_safe(&seat->keyboard_state.events.focus_change, &event);
 }
 
 void wlr_seat_keyboard_notify_enter(struct wlr_seat *seat,