package/dbus: drop unrecognized option

--with-xml option has been dropped seven years ago in version 1.7.4 and
https://github.com/freedesktop/dbus/commit/46602768c537bfa51af80ba2c67857f3a30c0e67

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/dbus/dbus.mk

@@ -28,7 +28,6 @@ DBUS_CONF_OPTS = \
 	--disable-asserts \
 	--disable-xml-docs \
 	--disable-doxygen-docs \
-	--with-xml=expat \
 	--with-system-socket=/run/dbus/system_bus_socket \
 	--with-system-pid-file=/run/messagebus.pid
 
@@ -110,8 +109,7 @@ HOST_DBUS_CONF_OPTS = \
 	--disable-xml-docs \
 	--disable-doxygen-docs \
 	--disable-systemd \
-	--without-x \
-	--with-xml=expat
+	--without-x
 
 # dbus for the host
 DBUS_HOST_INTROSPECT = $(HOST_DBUS_DIR)/introspect.xml