dbus: Remove unnecessary ifdef CONFIG_CTRL_IFACE_DBUS_NEW

This header file is only included if the new D-Bus API is enabled.

wpa_supplicant/dbus/dbus_new_helpers.h

@@ -52,8 +52,6 @@ struct wpa_dbus_argument {
 
 #define END_ARGS { NULL, NULL, ARG_IN }
 
-#ifdef CONFIG_CTRL_IFACE_DBUS_NEW
-
 #ifndef SIGPOLL
 #ifdef SIGIO
 /*
@@ -120,16 +118,4 @@ void wpa_dbus_get_object_properties(struct wpas_dbus_priv *iface,
 				    const char *path, const char *interface,
 				    DBusMessageIter *dict_iter);
 
-#else /* CONFIG_CTRL_IFACE_DBUS_NEW */
-
-static inline void wpa_dbus_signal_property_changed(
-	struct wpas_dbus_priv *iface,
-	WPADBusPropertyAccessor property_getter, void *getter_arg,
-	const char *path, const char *interface_name,
-	const char *property_name)
-{
-}
-
-#endif /* CONFIG_CTRL_IFACE_DBUS_NEW */
-
 #endif /* WPA_DBUS_CTRL_H */