input/seat: don't send redundant leave/enter on device creation

Fixes: #8143 #8173
Upstream issue: https://github.com/fcitx/fcitx5/issues/1044

sway/input/seat.c

@@ -802,11 +802,10 @@ static void seat_configure_keyboard(struct sway_seat *seat,
 		return;
 	}
 
-	// force notify reenter to pick up the new configuration.  This reuses
+	// Notify reenter to pick up the new configuration. This reuses
 	// the current focused surface to avoid breaking input grabs.
 	struct wlr_surface *surface = seat->wlr_seat->keyboard_state.focused_surface;
 	if (surface) {
-		wlr_seat_keyboard_notify_clear_focus(seat->wlr_seat);
 		seat_keyboard_notify_enter(seat, surface);
 	}
 }