package/matchbox-desktop: remove unrecognized option

--enable-expat is not a recognized option so remove it

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

package/matchbox-desktop/matchbox-desktop.mk

@@ -11,7 +11,6 @@ MATCHBOX_DESKTOP_SITE = http://downloads.yoctoproject.org/releases/matchbox/matc
 MATCHBOX_DESKTOP_LICENSE = GPL-2.0+
 MATCHBOX_DESKTOP_LICENSE_FILES = COPYING
 MATCHBOX_DESKTOP_DEPENDENCIES = matchbox-lib zlib
-MATCHBOX_DESKTOP_CONF_OPTS = --enable-expat
 
 # The bundled configure script does not properly replace LIBADD_DL, so
 # we force an autoreconf even if we don't have any patches touching